Showing posts with label 淞滬抗戰. Show all posts
Showing posts with label 淞滬抗戰. Show all posts

Sunday, September 1, 2013

Chiang Kai - Shek’s Gamble in Shanghai, 1937

Chiang Kai-Shek’s Gamble in Shanghai, 1937
ANTHONY WAN

In late 1937, a badly mauled Japanese army emerged victorious from the war- ravaged streets of Shanghai. Although the Japanese military leadership had confidently predicted the city would fall in three days, its Chinese defenders had held off the Japanese invaders in a bitter struggle lasting three months before finally being forced to retreat and relinquish control of the city. The decision to hold Shanghai at such costs, made by China’s wartime leader, Generalissimo Chiang Kai-Shek, can be regarded as a brave and dynamic show of defiance against a foreign invader. However, while the Nationalist Army’s troops did indeed put up a spirited defence, inflicting heavy losses to the enemy, their value as Chiang’s most elite troops was squandered, with only marginal benefit to China’s standing in the war. This was largely due to the high rate of attrition suffered by these elite German-trained units, for, despite their excellent training, they still lacked the amount of firepower necessary to challenge the Japanese. The loss of so many of these soldiers would, in turn, weaken Chiang’s position as leader of the Chinese Army, actually a coalition of multiple factions, of which only a portion were truly loyal to
him and the Kuomintang. Together, these factors would force Chiang to adopt a defensive posture for the remainder of the war. Indeed, Chiang Kai
- Shek’s decision to attack the Japanese in Shanghai in 1937, while not entirely without merit, was a poor use of military resources largely due to its irreparable toll on the Nationalist Army and its weakening of Chiang’s leadership over his coalition. Among other major consequences, this would, in turn, negatively impact China’s, and particularly the KMT’s ability to wage an offensive war against the Japanese.

The importance of Shanghai and the surrounding hinterland to the Chinese government was paramount. Indeed, Jiangsu and Zhejiang were the provinces over which the government had the greatest degree of territorial control, unlike the situation in North China.
1

The key cities of Nanjing (the capital), Hangzhou and, of course, Shanghai, were all situated in these two provinces. In addition, much of China’s industrial capacity was situated in the area around Shanghai.2

From a strategic standpoint, Chiang’s German advisors had warned that the loss of these two provinces would also allow the Japanese to effectively cut China in two, and if the Nationalists were to retreat southwards, they would be in a highly mountainous and relatively undeveloped region from which they would be hard-pressed to mount any counteroffensive.3
Thus, by extension, this meant that this was the region in which Chiang Kai- Shek could best mount a stand against the Japanese and he gave strict
orders for his troops to fight to the last man. Indeed, his determination to hold the city is evidenced in his refusal to comply with his advisors’ pleas for him to sue for peace with the Japanese, dismissing some of them as “old and impractical...[who,] after military defeat, [asked] for appeasement.”4
The region was simply too important to the survival of the KMT. More than any other province in China, Chiang could not afford to lose Jiangsu and Zhejiang
because of their vital importance to the KMT’s political and economic power. If China were to make any stand against Japan, it would understandably have to be here. The bulk of the Nationalist Army divisions tasked with defending Shanghai were the famous German- trained units, formed under the tutelage and supervision of military advisers sent by Weimar and later Nazi Germany throughout the early 1930s. Together with warlord armies hailing from Guangdong and Guangxi provinces, among others, these elite units that were poured into Shanghai from August to November of 1937
consisted of some 600,000 men, led by 35,000 officers trained at the prestigious Whampoa Military Academy, among other noted military colleges. As such, these units consisted of the most modern, best - equipped and highly trained soldiers in the entire National  Revolutionary Army, and were the only units that had the capacity to fight a modern war. Chiang hoped that, with these troops, he could wear down the Japanese in a war of attrition, proclaiming, “the time must come when Japan’s military strength will be completely exhausted, thus giving us ultimate victory.”
5

However, despite the fact that the Chinese force was numerically far superior to Japan’s 200,000 troops, these elite units were still inadequately equipped to face the Japanese on an equal footing in terms of firepower, equipment and mobility.6

The disparity between Japan’s heavy firepower and that of the Chinese Army was indeed great. Key to the Japanese advantage was their near - total air supremacy. Throughout the entire three - month battle, some 1,500 Japanese aircraft were able to lay down near- continuous fire down on Chiang’s men with virtual impunity, and there was little that the Chinese Air Force could do to challenge this with their 87 operational aircraft.7

The Japanese infantry elements were also well supported by armour and artillery, and finally, in addition to having air cover, they could also rely on the Imperial Navy for both naval gunfire support, and transport. Having no real navy of their own, the Chinese could do little to challenge the Japanese at sea. Indeed, it was the Imperial Navy that provided the Japanese with the advantage of mobility, and their boldly executed amphibious landing at Hangzhou Bay towards the end of the fighting in Shanghai would decisively break the Chinese defences.8

Although Chiang’s forces would still be able to inflict well over 40,000 enemy casualties, a feat in itself, they would still be beaten back with far greater losses of their ownby November 8. So complete was their defeat that the retreat from Shanghai was a scene of total confusion and disorganization; there was, by that time, little hope of regrouping.9
Thus,in spite of performing commendably incombat, these elite units were routed and virtually destroyed as an effective fighting force because they were still at an inherent disadvantage, and the cost of losing so many of them in a single battle was to have significant consequences for the KMT and its place within the coalition of which it was a part.

Although the Chinese Army was unified in name, it was actually an alliance of sorts made up of several powerful warlord armies, the Chinese Communist Party’s Red Army, and Kuomintang’s Nationalist Army, all under the overall command of the Generalissimo himself. This consolidation of power had been hard won. For example, the Red Army had been nearly destroyed during Chiang’s lengthy campaigns against the Communists during the 1920s and into the early 30s, removing it as a threat to his power.10
Later alliances with the most powerful of China’s warlords also helped eliminate other obstacles to KMT dominance.
Granted, Chiang’s army was far from the largest in the coalition by the time the United Front was declared, but it was the most powerful. Indeed, out of a total of 176 divisions loyal to the KMT government in 1937, Chiang had direct control over 31, and of those, only 10 were the German-trained units.11

This had been enough to ensure his position as leader of the coalition. As Colin Mackerras describes it, “Chiang’s army was not the only army in China, but it was the strongest and most important.”12
Thus, in early 1937, Chiang could be said to have cemented the KMT’s place as the dominant political group in China. Because so much of Chiang’s credibility as leader of the coalition hinged on his command of a well- endowed army, the massive losses these troops sustained during the fighting in Shanghai severely weakened this position.

It should be noted that the Nationalist Army would still continue to grow in numbers after 1937, and of course, the Nationalists would continue to secure notable victories later on. But the Communist Eighth Route Army and the warlord armies would also fight, and win, in many of the more decisive engagements, undermining the KMT's credibility as the leading faction; 13
the damage to the KMT had indeed been great. Indeed,the nearly 250,000 casualties sustained by the German- trained units in Shanghai had accounted for nearly 60% of Chiang’s best soldiers. Furthermore, some 20,000 of the 35,000 Whampoa-trained officers had also been lost in the fighting, greatly weakening the calibre of Nationalist Army’s officer corps, in whom so much of the future of the Army and KMT had been invested. Historian Chang Jui-Te notes that this accounted for some 10% of the total number of officers who had been trained at Whampoa (or the other important military academies in China at the time), all lost in a single action.14

More importantly, throughout the entire time the Nationalist forces were being slowly cut down in Shanghai, the Communist forces deployed elsewhere in the country remained largely unscathed, offsetting the power ratio between KMT and CCP forces.15

This was precisely what Communist leader Mao Zedong had needed; indeed he had, at the onset of war against Japan, predicted somewhat prophetically that “all [of the CCP’s problems] would be resolved smoothly.”16
Granted, the war was still at a relatively early stage, and the Communists themselves would lose their share of soldiers during the war, but never so many in such a decisively short space of time as the Nationalists did at Shanghai. Thus, although the Kuomintang could recover from its losses in Shanghai numerically, the reality was that the quality of the soldiers lost there, in terms of their superior training and discipline, was a permanent loss.

Finally, Chiang’s initial powerbase had been significantly boosted by his contacts in Shanghai’s financial community, and the fall of the city to the Japanese had hurt his position in that the KMT had now lost its major source of revenue and it would be some years before he could expect any real help from foreign aid. Both politically and militarily, the fighting in Shanghai had by the late 1930s made Chiang little more than what Jonathan Spence aptly describes as the “presiding coordinator of a loose federation of forces”, despite the apparently massive numbers of Nationalist troops on paper.17
The many perceived positive effects to come from the outcome of the battle are also deceptive. For example, while it could be said that the presence of the foreign concessions in Shanghai ensured that the battle would draw much attention from the Western powers, a number of historians have pointed out that such attention would have had little real impact on the situation. This could have been predicted by past experience: although the earlier battle of Shanghai in 1932 had drawn much condemnation of Japan by the West, the latter had done little, if anything, to dissuade the Japanese from continuing their campaign in China.18
Indeed, while it could be argued that Chiang and many in the KMT leadership were hoping that the battle in Shanghai would help rally Western support (especially because of the presence of the foreign concessions in the city), they were well aware of the more likely possibility that the West would probably do very little.19
In fact, many of Chiang’s foreign advisors had repeatedly pointed out that hoping for any effective foreign help at this stage of the war was unrealistic.
20

For example, both German advisor General Alexander von Falkenhausen and Australian advisor, W.H Donald, had advised at different times that if China was to go to war with Japan, she would largely be on her own for as much as two years before they could even begin to expect any foreign help.21
“Such views from highly placed advisors,” writes one historian, “[would] have disabused the government of any lingering
illusion of using the Shanghai campaign to trigger foreign intervention.”22
Perhaps the best demonstration of the unwillingness of foreign powers to intervene came in early December, when British and American gunboats were attacked while evacuating their citizens from Nanjing. Even after the American gunboat Panay was actually sunk by Japanese aircraft on the 12th, both governments quickly accepted Japanese apologies.
Although American President Franklin D. Roosevelt was sympathetic to China’s situation,isolationist sentiment was still too dominant in Congress for him to really do very much;meanwhile, the British were preoccupied with trying to keep another war from consuming Europe.23
In effect, although Chiang certainly hoped foreign governments might help put some measure of pressure on the Japanese, he was well aware of the fact that he would not be able to solely rely on them to conveniently solve the problem. For China, the moral support resulting from the battle was, perhaps, better than nothing at all, but obviously not enough to help China in any material sense.

Because of the poor management of the KMT’s military resources, the disaster at Shanghai would ultimately result in the government’s inability to adequately protect the vital two provinces of Zhejiang and Jiangsu, which would fall quickly under the Japanese advance over the next several months. Indeed, the very disaster that the Shanghai action was supposed to prevent had in fact transpired. The loss of crucial industrial facilities in the Shanghai area, coupled with the loss of so much of the Army’s offensive capabilities, largely meant that from 1937 onward, China was indeed mostly relegated to fighting a guerrilla war waged from the backwater regions of the country.24

Of course, the Chinese were able to transport some ofthese industries from the region and into the (relatively) more secure parts of the country the west, and the three months during which Chiang’s troops had the Japanese bogged down in Shanghai no doubt allowed valuable time for this undertaking to take place. Still, however, these areas of the country were no substitute for the highly developed coastal regions lost in 1937. Furthermore, those western provinces were, as pointed out earlier, areas of the country over which the KMT did not enjoy as much direct control as they had in Zhejiang and Jiangsu. In effect, almost everything that had arguably made Chiang the most powerful man in China evaporated away with the defeat in Shanghai.

On November 9th, Chiang finally ordered his troops to retreat, but they had, in fact already been falling back for some time. Worse yet, their retreat was not the orderly one for which they had prepared, as the retreat was chaotic and disorganized. Although their performance in the battle had demonstrated to the world that after nearly a century of humiliating concessions and military defeats by foreign imperialist powers, China was willing to fight and pay dearly for the defence of its home soil, Chiang’s handling of the battle had had very severe consequences. As has been shown, the decision to launch an offensive against the Japanese in Shanghai was far more damaging to Chiang and the KMT’s status in China than it was beneficial, and was carried out rather recklessly. Firstly, the crack, German- trained troops of the Nationalist Army, the best - trained and best - equipped Chiang (or any Chinese general, for that matter) had at his disposal, were still largely outgunned by their Japanese counterparts. With the sheer numbers of men under his command, a more guerrilla - oriented campaign against the better - armed Japanese would have perhaps been more effective. Squandering so many of these valuable units in a single battle, especially when the best of them were so few in number, was tactically unsound. Of course, these units performed bravely and still inflicted heavy losses on the Japanese, but in the end, the price they paid for this was one from which the Nationalist Army would find it difficult to recover. Chiang’s gamble would negatively alter the power dynamics of his position within the coalition he had formed because he had essentially lost the very ingredient that had made him the leader of that coalition in the first place: a powerful army. Indeed, before Shanghai, Chiang’s army had easily been the best in China whereas by the time his troops had retreated from the city, Chiang’s position was far more fragile. Granted, making a stand at Shanghai can still be looked on as something of a necessary evil for the Nationalists, due to the region’s strategic importance to the KMT, but this does not change the fact that the resources with which Chiang had to defend it were gravely misused. Thus, the Generalissimo’s gamble at Shanghai was perhaps made with sensible concerns in mind, but it was poorly executed due to a failure to properly recognize the inherent weaknesses of the Nationalist Army in relation to their adversaries, and its far - reaching effects were consequences that the KMT simply could not afford.

----------------------
1 Hsi-Sheng Chi,Nationalist China at War: Military Defeatsand Political Collapse, 1937-45 (Detroit, Michigan: University of Michigan Press, 1982), 45.
2 Ibid., 46.
3 Ibid., 46.
4 Chiang Kai-Shek, diary entry. November 20, 1937 quoted in Jay Taylor,The Generalissimo:Chiang Kai-Shek and the Struggle for Modern China(Cambridge, Massachusetts: Harvard University Press, 2009), 151

5 Chiang Kai-Shek,Collected Wartime Messages of Generalissimo Chiang Kai-Shek, 1937-1945,II vols. (New York, New York: John Day, 1945), 49, as quoted in Jonathan
Fenby , Generalissimo: Chiang Kai-Shek and the China He Lost (London: Simon & Schuster,2003), 310.
6 Chi, op cit, 37.
7 Taylor, op cit, 149.
8 Marvin Williamsen, “The Military Dimension, 1937-1941,” in China’s Bitter Victory: The War With Japan, 1937-1945, ed. James C. Hsiung and Steven I. Levine, 135-156 (Armonk, New York: East Gate, 1992), 143
9 Williamsen, op cit, 144

10
 Edward L. Dreyer,China at War: 1901-1949(New York, New York: Longman, 1995),219.
11 Chi, op cit, 37.
12 Colin Mackerras, China in Transformation: 1900-1949(New York, New York: Addison Wesley Longman, 1998), 54
13
Dreyer, op cit, 219.
14
Jui-Te Chang, “Nationalist Army Officers during the Sino-Japanese War, 1937-1945,” Modern Asian Studies(Cambridge University Press) 30, no. 4 (October 1996): 1033-1056, 1046.
15
Jay Taylor, The Generalissimo: Chiang Kai-Shek and the Struggle for Modern
China(Cambridge, Massachusetts: Harvard University Press, 2009), 148.
16
Mao quoted in Zhang Guotao,The Rise of the Chinese Communist Party(Lawrence, Kansas:University Press of Kansas, 1971), as quoted in Taylor, 143

17
Jonathan Spence,The Search for Modern China, Second Edition (New York, New York: W.W. Norton, 1999), 434.
18
Wai Chor So, “The Making of the Guomindang’s Japan Policy, 1932-1937: The Roles of Chiang Kai-Shek and Wang Jingwei,” Modern China (Sage Publications) 28, no. 2 (April 2002): 213-252, 243.
19
Although there was little in the way of practical help from foreign governments at this
time, it is worth noting that China did garner much public support from these countries. Key figures in the American administration, including President Roosevelt himself, also sympathized with the Chinese plight. It should also be pointed out that after the massacre at Nanjing in December, the US government did impose trade embargoes on Japan, and although this would compel the Japanese to (briefly) reconsider their policy on China, it would of course still be another four years before America (and their European allies) would enter the war.
20
Chi, op cit, 47

21
Ibid., 47.
22
Ibid., 47.
23
Dreyer, op cit, 220.
24
Hsi-Sheng Chi, “The Military Dimension, 1942-1945,” in China’s Bitter Victory: The War With Japan, 1937-1945, ed. James C. Hsiung and Steven I. Levine, 157-184 (Armonk, NewYork: East Gate, 1992), 179

http://ubcatlas.files.wordpress.com/2012/10/2011-wan.pdf

從蔣介石日記看淞滬抗戰的一個問題

關於淞滬抗戰戰略,史學界有不同的觀點。一種觀點認為,從開戰之初,甚至開戰之前,中方就有改變日軍作戰軸心,即改日軍南下為西上的戰略意圖。一種觀點是否認中方有這種企圖。其間,也有的學者取折衷態度。意見歧出,關鍵原因是第一手資料不足,而只能對現有史料作不同的解讀。今年,保存在美國斯坦福大學的《蔣介石日記》又進一步公佈,為探討這一問題,提供了進一步的可能。

從蔣氏日記看,盧溝橋事變後,蔣介石關注的重點在華北,他對日軍的挑釁採取了積極應對的態度。盧溝橋事變的第三天,蔣介石就思考“乘此次沖突之機,對倭可否進一步要求其撤退丰台之倭兵或取消冀東組織”,“積極運兵北進備戰”,“準備動員,不避戰爭”。 [1]


7月10日,蔣介石在日記中寫道:“動員六師北運增援,如我不積極準備,示以決心,則不能和平解決也。 ”


7月12日,蔣介石決定“在永定河和滄、保線持久戰”, “中央軍集中保定”。


蔣介石此時已經判斷日本侵華“勢必擴大”,“不能避戰矣”​​0[2] 

不過,蔣介石認為日軍此時仍在採取“不戰而屈之慣技”,而他則採用“戰而不屈之決心待之”[3]。 
此時蔣介石對日本侵華的整體判斷是日本“志在華北局部而不敢擴大”,“戰爭最多限於局部”[4]。 
19日,蔣介石決心發表廬山談話,“再不做倭寇迴旋之想,一意應戰矣”。 [5] 
7月26日,針對日方步步緊逼,蔣介石進一步認識到戰爭的不可避免,他雖不願宣戰,但抗戰決心已經下定。

 
“遭必不能免之戰禍,當一意作戰,勿再作避戰之想矣。 ”[6] 

當日軍大舉進攻北平後,蔣介石進一步判斷: “大戰再不能免”[7]。
 

8月7日,在蔣介石的日記中出現了他對長江流域關注的記錄。他針對7月27日駐漢口日本海軍和僑民撤退,在當天的日記中寫道:“敵放棄漢口,是其對長江有避免作戰之意乎?”[8] 
他在8日進一步堅定了這一判斷,他說:“漢口倭軍之果然撤退,其長江各埠海軍亦撤退,是表示其不在長江之意多,而集中以後再進攻之意少也。 ” [9] 
早在抗戰前,中國方面就已醞釀在日本發動侵華戰爭的前提下,主動在上海進攻,消滅上海日軍,保衛經濟重心,捍衛首都,並將這一思想寫入1937年2月南京政府制定《民國二十六年度作戰計劃》中D[10] 
盧溝橋事變後,張治中出任淞滬警備司令,並於7月30日提出“主動進攻,先發製敵”的建議,並提出主動擊敵的四個條件o[11)【llj貝)同日召開的“盧溝橋事件第2O次會報”,商定了對上海日陸戰隊之應付計劃;對漢口日租界之掃蕩計劃;長江下游各要塞之阻塞及對日艦之掃蕩計劃oCl2 ̄【4'-46 ̄ ")在蔣介石8月4日日記中有“應先取攻勢之利害”的記錄,說明蔣介石此時對進攻上海日軍問題,還未作出最終決策。 
促使蔣介石下最後決心的是日本大量援軍到滬。蔣在8月11日日記中寫道:“下午聞倭艦隊集中滬市,且有八大運輸艦到滬,預料其必載陸軍來滬,故決心封鎖長江口。 ”日援軍到滬引起蔣介石的警覺可以說,封鎖長江口是實施上海戰略的一個開始。 
8月13日上午,日海軍陸戰隊向中國軍隊發動佯攻。 
8月14日,中國軍隊向日軍發動進攻,全面抗戰由是爆發。 
主動發起進攻是戰前戰略方針的具體實施。這一方針就是迅速消滅上海日軍,保衛上海經濟重心和捍衛首都,從蔣的日記也可以證明這一點。 
8月14日,中國空軍出動轟炸上海日軍,因有兩架飛機彈鉤被擊壞,故有兩彈落入英法租界,導致英法美諸國不滿,責難備至,對滬戰有乾涉之意。 
對此,蔣介石在日記中寫道:“唯望神聖保佑中華,使滬戰能急勝也”[13]。可見,蔣介石在這一時期並不願在上海長期作戰,也無引敵到滬的目的。 
不唯如此,蔣介石還想利用外交手段實現收回上海。他在20日日記中寫道:“本日滬戰頗有進展,南口陣地已固,此心略安。對英提案運動其能實現,使倭得轉圜離滬,以恢復我經濟策源地,以今日戰況或有可能也。 判斷情報,倭陸海空軍意見分歧,政府內部不一,已蹈於進退維谷之勢也。 ” 
[1引8月20日,大本營頒發作戰方案。這一方案,以華北為主戰場,決定“對北正面(平津)為限制敵軍之自由轉移兵力於平綏路,及使我第二戰區在平綏路方面作戰之便利起見,應即派有力之一部(約兩軍),近迫當面之敵,實行柔性攻擊,同時抽調在平漢路北端之部隊(機動性大而富於遊擊戰之經驗者)約三師(能多更好),歸第二戰區長官指揮,向懷來,萬全之線以北轉進。 對東北正面(山東半島)極力縮小青島之圍攻線,使敵軍爾後展佈困難,可能時則以有力之一部襲取而佔領之”。
 

第二​​戰區“為華北唯一之屏障,務須永久固守,以為國軍爾後進出之軸心。 平綏線為第二戰區之生命線,亦為中蘇聯絡之生命線,更為我國軍旋回作戰之能實施與否之中樞線,應以南口附近為旋回之軸,以萬全、張北、康保等地方為外翼,要固守南口、萬全,國軍作戰方有生機,要攻略張江、赤城、沽源,國軍方能展佈,如南口、赤城、沽源之線,始終為國軍保有,則平津方面之敵,絕不敢冒險南下,故本戰區之作戰為第一步,以該戰區現有之兵力,最低限度,必須固守南口、萬全之戰('戰'疑為'線'——引者註),以俟第一戰區轉移兵力之到達。 
第二步,第一戰區轉移兵力到達後,向赤城、沽源之線轉移攻勢。 
第三步,依戰況推移,對於山西東北方面,厚積兵力,以期永久固守。  
從這_決策看,中方在日本侵華的主要方向是立足於守。堅守平綏路上重點地區,並攻略察北為平綏線之掩護。 
上海方面第三戰區,任務為“迅速將目下侵人淞滬之敵陸海軍及空軍陸上基地,掃蕩撲滅,以準備敵軍再來時之應戰,同時對於浙江沿海敵可登陸之地區,迅速​​構成據點式陣地,阻止敵人登陸,或乘機殲滅之o"按照這一方針,第三戰區組成淞滬圍攻區,江南岸守備區,浙東守備區,一方面圍攻淞滬之敵,一方面警惕沿海敵登陸。上海顯然立足於攻。 
可以這樣說,中方的戰略是北​​重於南,以南部之攻,策應北方之守,沒有變改日軍南下為西上之意圖。蔣介石後來對此說得很清楚。 1938年1月11日,淞滬會戰結束不久,蔣介石總結說:“我們此次為什麼要在上海作戰呢? 就是要打破敵人的戰略,使他們不能按照既定的計劃集中兵力侵略我們的華北。 ” (16] 
(不過,蔣介石所說的打破敵人華北計劃也不是像後來研究者所說的那樣要改日軍南下為西上,因為蔣介石當時根本沒有判斷日軍南下。 蔣介石在同一總結中明確地講道: 
“至於敵人的作戰計劃如何呢?他預定的作戰計劃,就是想以少數的兵力,在最短的時間一舉擊而消滅我們的軍隊,迫使中國屈服,然後迴轉頭來,應付世界大戰。 所以他預定的作戰目標,就是想佔據永定到察綏一帶的防線。 在這條線以北,堅築對俄陣地,積極向西伯利亞採取攻勢。 後來我們發動全面長期抗戰,使他後退不能,固守亦不可得,就不得不被動地伸展到黃河北岸。 現在他愈陷愈深了。 ”¨ 
(一則蔣介石日記更可說明這一點。淞滬會戰期間,蔣介石在1937年9月29日日記中寫道:“注意: 
一、英不願俄參加遠東戰事乎; 
二、引敵深入黃河以南,使英俄著急,不得不參加遠​​東戰事。 ”可見,蔣介石非但沒有改變敵人南下的意圖,而且還曾有過主動引敵南下的思考。 
戰爭具有不確定性。實現計劃於戰爭較之實現計劃於別的事業,有著更多的困難。儘管作了長時間的準備,但受制於主客觀因素,中國在上海的戰略預想並未達成。
 

戰役之初,中國軍隊雖一度掌握戰場主動,但從8月14日到8月22日,在日軍增援部隊到達前,卻沒有將在上海的日軍消滅。從主觀上說,中國軍隊挺進上海後,未能及時攻擊,使攻擊失去突然性,且在進攻中數次停止攻勢,予敵以準備時間。而中國軍隊又存在指揮不當的問題,“不能徹底集中兵力,形成重點,及步砲兵沒有協同動作”,以致“我軍以五師之眾,對數千的敵陸戰隊實行攻擊,竟未能奏功o 從客觀上說,日軍火力猛烈,堡壘堅固,以及上海作戰受到外國勢力製約等都影響了初期的進攻戰。
8月23日,日本援軍到達上海,並登陸成功。敵登陸成功後,主力猛撲羅店,進窺嘉定。中國軍隊一方面繼續圍攻虹口、楊樹浦之敵,一方面調動軍隊,將敵阻於羅店一帶。敵在羅店不能進展,又轉向吳淞附近及虯江碼頭強行登陸,中國軍隊及時趕到反攻,但因敵火力猛烈,未能消滅登陸敵人。至此,淞滬戰線由市內擴展到市外。 8月28日、9月1日,羅店、吳淞兩地先後失陷。 

蔣介石為之感慨道:“近日戰局漸轉劣勢,人心動搖。此次戰事本無倖免之理,雎冀能持久耳 
(9月6日,日軍攻陷寶山,沿江敵人連成一線,並以主力沿寶劉公路向楊行突進。9月11日占領楊行,並向劉行猛攻。 楊行失守,蔣介石認為“實為上海戰局成敗之樞紐”。 [19] 
日軍登陸成功,使中國軍隊原定之迅速掃蕩上海日軍的計劃落空。淞滬抗戰歷時兩旬後,淞滬前線指揮官張發奎和張治中向最高統帥部建議:“對上海會戰可能適時運用兵力之最高點,作有效而精密的​​計算,若超過這個限度仍不能挽回戰局以製壓敵人時,則我們的戰略,似應轉變為持久消耗戰,並先以十個師預行佔領蘇、嘉、吳、福之既設國防工事,作為第二抵抗線”。 
蔣介石在9月2日日記中寫道:“本月對上海戰線之調整與縮短,決定方針。”[21]但蔣介石認為“昊淞失陷,戰況漸處被動,然而前方士氣甚旺,不願撤至第二線也”;他還判斷“滬戰尚可持久,敵雖再增三個師團亦無能為力也”[蔣介石對河北戰場形勢也很樂觀,他認為:“河北敵軍進展甚遲,其力甚弱,只要我努力固守,敵必師老頓挫也。 ” 
9月6日,軍事委員會下達《淞滬抗戰第二期指導計劃》,提出 
“一、本戰區為保持經濟重心,鞏固首都,並有利於全局之持久作戰起見務就現已形成之包圍態勢,對於上海及各處上陸之敵,運用優勢兵力斷絕其聯繫,限制其發展努力圍攻由獅子林及川沙方面上陸之敵,打破其包圍企圖,而收各個擊破之效。 
二、如各個擊破之目的不能達到,則依狀況逐次於後方佔領陣地,採取攻勢防禦,乘其海陸火力不能協調之際,發揚我之精神與物質威力,一舉而擊破之。 
三、於萬不得已時,則退守後方既設陣地,作韌性之抵抗,以待後方軍隊到達,再行決戰,期護(獲)得最後勝利。 (23]

則9月6日的作戰方案實際是戰前國防計劃甲案和戰爭之初8月20日方針的繼續,但此後全國抗戰局勢出現新情況,上海戰場地位日益重要。
 

從全國戰局看,8月底,張家口、南口相繼失陷。中國方面在華北爭取戰略主動的關鍵幾步皆未達成。同時,日軍在上海迅速登陸,使國民黨原計劃的掃蕩上海日軍的方案也無法實現。
8月30日,何應欽分析軍事形勢時說:“自南日、張家:失守,我在北正面有利之態勢已失”,“滬戰膠著,雙方無限制增兵。 我為確保江南腹心地,又不能不以精銳部隊與敵周旋。 因之我戰略重點,無形中已轉移於江南。 此時北正面只有採取守勢作戰,逐次抵抗,與敵持久,以待川1桂軍集中完畢,或滬戰告一結束,方可策劃北正面攻勢。 ”[24](77頁)從何應欽的分析看,由於華北失利,中國抗戰主戰場無形中發生變化,上海軍事的發展已不是策應華北的問題了,而成為抗日的主戰場了。 如何應欽所說“上海方面,暫時以陣地戰之手段與敵持久,俟敵兵力疲憊,仍(乃)相進攻,以期可以轉用兵力。 ”[25] 

在晉綏是固守,在河北是待川桂軍集中完畢,或江南兵力可轉用時再策劃進攻。至此,南北主次已經易位。 
淞滬戰場中日膠著,中國方面欲全部消滅上海日軍已經不可能。上海抗戰面臨新的選擇。 
是按戰前的預案後撤、進行持久抗戰,還是繼續守衛上海呢?蔣介石沒有馬上下定決心。 
9月1 1日,日軍佔大同,晉北重鎮失陷。 14日,蔣介石在日記中寫道:“注意: 
一、大同失陷,閻之罪惡甚於宋之平津……可痛之至,對於蘇俄之運貨交通更生​​困難矣。 
二、集中主力在上海決戰乎?抑縱深配備,長期抵抗乎?  
這說明,在華北失利的情況下,蔣介石在繼續守衛上海,還是後退預設國防線、節節抵抗,尚未下最後決斷。 
9月15日,蔣介石決定調整上海第三戰區高級指揮官,並提出注意真如、南翔、嘉定、瀏陽間之永久工事和縱深配備之集團軍群o[26] 
9月16日,羅店、劉行陣線為日軍突破。同日,蔣介石在日記中寫道:“上海之得失不關最後之成敗,不必拘泥於此也。 ”9月17日,中國軍隊根據第二期作戰計劃調整部署,全線退守北站、江灣、廟行、羅店西南、朝王廟、雙草墩迄於運河一線,轉入陣地戰。中方全部攻擊停止。 21日,中國軍隊調整部署,改編為右翼、中央、左翼三個作戰軍,由張發奎、朱紹良、陳誠分別擔任總司令。 
這一時期,蔣介石一度傾向後退進行逐步抵抗。他在日記中寫道:“敵增援部隊既到,第四軍與六十六軍損傷奇重,不如乘敵被我擊退之時設法後移,加強後方兵力,但仍留相當兵力在原陣地牽制,以玩弄日寇,故決撤至劉羅線本陣地,以達逐步抵抗之目的”。 [27] 
但此後南北戰局變化和國際形勢的發展,又使蔣介石傾向堅守上海。 9月25日,蔣介石在日記中寫道:“ 
注意:一、保定似已經失陷; 
二、敵威脅我遷都; 
三、敵擬進佔鄭州,以截斷我中俄第二聯絡線。  
9月26日,在蔣介石的日記中又出現這樣的記錄, 
“注意: 
一、美國外交漸有轉機; 
二、對英運用…… 
四、蘇俄之交涉; 
五、平漢線潰敗,滄州亦已不守,北正面只可守沿太行山脈側面陣地矣……”

但蔣介石對這一局面卻不是非常憂慮,“對北正面戰事雖不利,但餘心無甚慮,係以主戰場在上海也”[28]。 

蔣介石之所以如此,一方面因北方戰局已無可挽回,一方面因為他正醞釀利用中國軍隊主力集中上海的機會,充分利用上海戰場的價值,通過上海抗戰,進而影響全局。 
27日,蔣介石決定四項對敵戰略: 
“一、引其在南方戰場為主戰場;二、擊其一點;三、持久;四、(沿太行山脈側面陣地)由晉出擊。 蔣並推斷:“下月戰爭方能決定久暫或勝負。 ”[29]
 

引敵到南方作戰,是淞滬戰略的新發展是蔣介石根據當時淞滬戰場乃至全國戰場和國際局勢演變的一個新決策。但引敵到上海作戰,並不是像後人說的那樣,想引敵人沿江西上,進行持久戰爭,而是要堅守上海,因為蔣認為:

“相持半年,遲至明年三月,倭國若無內亂,必有外患,須忍之o”[3o]9月中旬以後,日援軍到滬已近20萬人。戰況對中國漸趨不利。在日軍的猛攻下,中國軍隊左翼陣地,相繼失陷,且無力恢復,全線處於被動挨​​打局面,不得不向蘊藻浜南岸、廣福、施相公廟、瀏河之線轉移。 

9月30日,日軍又集中主力,沿滬太公路南下,向蘊藻浜進犯,企圖佔領大場,威脅中國軍隊側背,達到其占領上海的目的。 
10月初,日軍決定將主作戰方向轉向上海o[31] 
在日援軍大量到滬的情況下,中方的正確的戰略應是及時調整部署,控制蘇福、錫澄國防線,作持久抗戰。但此時國際形勢演變,嚴重影響了國民黨的淞滬戰略,蔣介石進一步作出了死守上海的決策。 
蔣介石是個軍人政治家。在蔣的思想中,苦撐待變,等待國際形勢變化,是其抗日戰略的重要組成部分,因京滬地區是國民黨長期經營的政治經濟中心,國際觀瞻所繫,開闢淞滬戰場本身就有政治意義。

 
在盧溝橋事變之後,蔣介石頻頻話動,呼籲國際社會,特別是英美對日本進行幹涉。弱國抗擊強大的侵略國家,爭取外援,聯合與國,乃為必要正當之舉,無可厚非。關鍵是如何處理政治與軍事的關係。 

隨著9月中旬以後,國際上譴責日本的呼聲興起,國民黨將政略的考慮放砑戰略之上,最終導致了軍事上的重大失利。 
9月19日,國聯大會接受中國申述。 27日,國聯決議譴責日機濫炸。 
lO月5日,美國總統羅斯福在芝加哥發表《隔離演說》,將侵略行動喻為傳染病之蔓延,呼籲為防護國際社會之健康,應加以隔離。以此為契機,西方國家對日本製裁論興起。 
10月6日,國聯決議召開九國公約會議。 
國際形勢有利於中國抗戰。蔣介石認為,“本日美國總統宣言與國聯決議,皆於我精神助力甚大,唯以軍事局勢不能轉入主動地位為慮耳”[32】。 
10月8日,蔣介石“決調桂軍加入滬戰,不能放棄上海''[3 3] 
10月11日,再次決心“滬戰仍應決戰到底"[34 ]

 
國民黨寄希望於九國公約會議國家能以實際手段製裁日本,所以過分地考慮政略,如參加淞滬戰役的宋瑞珂所說,“故不惜以戰略遷就政略,一面派顧維鈞為出席九國公約會議代表,一面加強陣地戰,冀於戰場上取得有利之態勢,以為外交聲援,於是傾注全力於大場之陣地戰”o[35】


國民黨淞滬戰場最高指揮官之一的陳誠在總結淞滬抗戰失敗原因時,把“政略影響戰略”列為首位。


則還在9月11日日軍攻陷楊行時,'14日陳誠到劉行指揮。他認為,為要長期抗戰,須轉移陣地,逐次抵抗,但蔣介石為取得國際同情與認識,尚欲死守劉行。

 
結果,在付出巨大犧牲後不得不後退。整個lO月的戰鬥是淞滬抗戰最慘烈的階段。 l0月7日,日軍由蘊藻浜北岸猛攻南岸中國守軍之側背,企圖一舉突破南岸陣地,佔領大場。

 
當時,中國軍隊在蘊藻浜之兵力為8師、16師、57師,因戰鬥激烈,8師兵力傷亡殆盡,左翼之黑大黃宅附近陣地被突破,以第1軍及第8軍與26師、2O軍陸續增援仍不能阻敵攻勢。 1O月15日,第21集團軍到達上海,19日全線出擊,以48軍、61軍、98師為三路進攻軍,防守各師亦編成一至三個突擊隊,向敵反擊,經三日激戰,亦未恢復失去陣地,原陣地亦無法維持,中國又調集19師、18師、26師、33師至大場方而,同時將第3、53師加入,將左翼之11師、14師及在太倉整理的15師調來,才得維持戰局。


但數日後又感危險。 24日逐次退守大場、走馬塘。 26日大場失陷。敵對閘北、江灣及廟行一線的中國軍隊形成包圍,中國軍隊不得不向蘇州河南、江橋鎮、小南翔之線撤退。當中國軍隊在大場、走馬塘撤退前後,適值九國公約開會。


中國為爭取國際同情,原擬在該線死守,後因被迫後退,無法維持,始轉移蘇州河。 ¨


則在大場作陣地死守,是國民黨將政略放在戰略之上,因政略而犧牲戰略。在大場失守後,中國軍隊如能迅速撤退,淞滬抗戰仍不致全面失敗。但在11月4日,日軍在金山衛登陸,對中國軍隊迂迴包圍的情況下,蔣介石仍下令陳誠再堅持三天。


結果,當8 13下令退卻時,前方已潰不成軍,大軍倉皇后撤,加以敵機日夜轟炸,人馬踐踏,秩序大亂,數十萬大軍竟越過鋼筋水泥之國防線而不能駐足。 11日,上海淪入敵手。 

從上面的討論看,《蔣介石日記》所提供的資料,也難以證明和支持淞滬戰略從一開始就有改變日軍作戰軸心,即改日軍南下為西上這一戰略意圖的觀點。 
相反,我們可以進一步證明這樣的判斷: 
中方淞滬戰略有多重目的,前後側重點又有所變化。

 
首先是欲消滅上海日軍,保衛政治經濟中心,然後是配合華北戰場,繼而因南北易勢,上海戰場地位上升,蔣介石又有引敵到南方為主戰場的思想。最後,政略影響戰略,導致中國軍隊失去有利的撤退時機。

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[1] 《蔣介石日記》1937年7月9日(美國斯坦福大學胡佛研究院所藏,以下不再注出)。[2] 《蔣介石日記》1937年7月12日。[3] 《蔣介石日記》1937年7月17日。[4] 《蔣介石日記》1937年7月2O日。[5] 《蔣介石日記》1937年7月19日。[6] 《蔣介石日記》1937年7月26日。[7] 《蔣介石日記》1937年7月27日。

[8] 《蔣介石日記>1937年8月7日。[9] 《蔣介石日記>1937年8月8日。[10]張治中:《揭開八一三淞滬抗戰的戰幕),《八一三淞滬抗戰>,中國文史出版社,1987;“民國二十六年度作戰計劃”(甲),《民國檔案)1987年4期。[11]張治中:《揭開八一三淞滬抗戰的戰幕>。[12]《盧溝橋事變第二十次會報・1937年7月30日下午9時>,中國第二歷史檔案館編《中華民國史檔案資料彙編>第五輯第二編《軍事>(二),江蘇古籍出版社,1987。[13] 《蔣介石日記>1937年8月l4日。[14] 《蔣介石日記>1937年8月2O日。
(15]中國第-05史檔案館:《日戰爭正面戰場》(上),江蘇古籍出版社。1987。[16]蔣介石:《蔣委員長對抗戰檢討與必勝要訣訓詞》f上),秦孝儀主編《中華民國重要史料初編——對日抗戰時期》第二編《作戰經過》(一)。中國國民黨中央委員會黨史委員會編印。 1981​​。
(17]《陳誠私人回憶資料>(上),《民國檔案)1987年1期。
(18]日本《產經新聞>社:《蔣介石秘錄》(四),湖南人民出版社,1988。
(19] 《蔣介石日記}1937年9月12日。(2o]張發奎:《抗日戰爭回憶錄>,《廣東文史資料>第55輯,廣東人民出版社,1986。(21] 《蔣介石日記)1937年9月2日。(22] '蔣介石日記)1937年9月4曰。(23] 《淞滬抗戰第二期指導計劃・1937年9月6日>,《抗日戰爭正面戰場》(上)。


[24] 《國民政府國防部史政局及戰史會檔案・8月3O日下午8時會報》,中國第二歷史檔案館編《中華民國史檔案資料彙編》第五輯第二編《軍事》 (二),江蘇古籍出版社,1997。[25] 《蔣介石日記》1937年9月14日。[26] 《蔣介石日記》1937年9月15日。[27] 《蔣介石日記》1937年9月24日。[28] 《蔣介石日記》1937年9月26日。[29] 《蔣介石日記》1937年9月27日。
[30] 《蔣介石日記>1937年lO月l5日。[31] 日本防衛廳防衛研究所戰史室:<中國事變陸軍作戰史>(。中華民國史資料叢稿譯稿)第一卷第二分冊。齊福霖譯,宋紹柏校。中華書局,1981。[32] <蔣介石日記)1937年lO月7日。[33]《蔣介石日記)1937年lO月8日。[34]<蔣介石日記)1937年lO月11日。[35]宋瑞珂:<八一三淞滬抗戰紀實>,政協上海文史資料委員會編<抗日風雲錄>(下),上海人民出版社,l985---------------------

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