Prelude
On March 8, 1942, advanced elements of the 200th Divisionarrived at Toungoo on the same day Rangoon fell. The Chinese took over the defense of this key location from a small detachment of British forces. Toungoo controlled the road north toward Mandalay and the bridge over the Sittang River that carried the road east to the Karenni States and north to Loikaw, the Shan States, Lashio and the Chinese province of Yunnan. Capture of the city could threaten the flank of the Allied defensive line in Burma and open the way to a Japanese advance into Central Burma.
Major-General Dai Anlan the divisional commander, decided the city of Toungoo itself would be the main defensive position of the Chinese forces, with an outpost line to the south at Oktwin. He sent the Motorized Cavalry Regiment and 1st Company, 598th Infantry Regiment to the banks of the Kan River 35 miles south of Toungoo and 12 miles south of Pyu. The cavalry regiment plus a company of infantry pushed up to Kan River, with a platoon of cyclists taking up position near the bridge at the village of Nyaungchidauk. They were to delay the advance of the Japanese until the defenses at Toungoo were complete.
Meanwhile the 200th Division began digging in within the old city walls and at the advanced line at Oktwin. Toungoo city itself was divided into the new town to the east of the railway and the old town to the west. The old town had a well preserved ditch and fortified wall which provided a good defensive position for the Chinese. The Chinese then enhanced their defenses with carefully concealed positions built using an abundant supply of local timber. To make things more difficult for the attackers the land around Toungoo was flat and featureless, except for the Sittang River to the east.
Ten days later on March 18 the first skirmish with the leading elements of the Japanese 55th Division, began on the Kan River at Nyaungchidauk. Falling back over the next three days, the Chinese cavalry delayed the Japanese advance while the Chinese completed their defenses at Oktwin and Toungoo. When the Japanese attacked Oktwinthey were held for another two days by determined Chinese resistance.

New Assault
On March 28, the 3rd Heavy Field Artillery Regiment arrived, and with strong support from bombers and more gas attacks inflicted heavy casualties on the Chinese. The right wing of the attack managed to destroy many Chinese strongpoints with artillery support. However, the light bombers did not arrive until 1500 due to heavy fog at the airfields, and it was not possible to overcome stubborn resistance of the Chinese due to their defense in depth, even though the fighting lasted into the evening.
Meanwhile, the Reconnaissance Regiment of the Japanese 56th Division, consisting of two motorized infantry companies and a machine gun company, a field artillery company of mountain guns, and a platoon of engineers, was moving rapidly north from Rangoon in a column of 45 trucks, with a company of 6 armored cars and a total of some 404 men. It made rapid progress along the main road to Toungoo and reached divisional HQ of the 55th Division by noon on March 28. It was decided to move this force east of the Sittang River to attack the rear of the Chinese positions. Crossing at 2000 the same day, it forded the Sittang at Wagyi, a few kilometers south of the city where the water was only chest high, leaving its vehicles behind.
If the Japanese attack east of the Sittang was successful, the entire 200th Division would be encircled. The divisional commander personally organized the defence, and two companies from the 3rd Battalion of the 598th Regiment were ordered to attack the exposed left flank of the Japanese. A vicious fight continued within the city of Toungoo. Around the divisional HQ on the east bank, fighting inflicted heavy casualties on the 3rd Battalion, 599th Regiment as well as the divisional support company; but the Chinese were able to hold their ground.
On March 29, the 55th Division used its last strength to attack, supported by all available guns. By noon, the troops on the left were able to advance into the north western part of the city, and the escape route of the Chinese was threatened. Covered by the fight to the west, the Reconnaissance Regiment of the 56th Division moved north and attacked the Chinese flank guard east of the river and by midday on the 29th had overrun it. Threatening the divisional HQ of the 200th Division and the Sittang River bridge.
On the afternoon of March 29 orders came for the entire 200th Division to withdraw that evening towards the east initially, then to the north along the eastern bank of the River Sittang. Fighting in the city continued into the dark with the city on fire. The Chinese continued to resist stubbornly and no progress was made. By 2200 on March 29, 56 Division's motorized Reconnaissance Regiment had closed in on the bridge over the Sittang River and noted signs of wavering in the Chinese forces as night fell.
Chinese Withdrawal
However this was the Chinese withdrawal. Dai Anlan had each Chinese battalion leave a rearguard which launched night attacks to cover the withdrawal of the main force. The retreat was led by the 599th Regiment crossing the battered and threatened bridge, followed by the 600th Regiment and then the 598th Regiment which forded the river. By 0400 the entire 200th Division had moved out of Toungoo in good condition, taking all the wounded along. The Chinese claimed that their rearguards left before dawn.
On the morning of March 30 the 55th Division attacked all along the front claiming heavy resistance, despite withdrawal of most (if not all) of the Chinese. After engineers managed to blow up Chinese positions and strongpoints at 0850, the 55th Division troops finally broke through and linked up with the troops of the 56th Division that had seized the vital bridge over the Sittang at 0700 and then attacked Toungoo from the east. This ended the battle leaving the Japanese in possession of the city and bridge over the Sittang. The road to the east was open for the Japanese to use to outflank the allied line in Burma.
New 22nd Division sent south to support the 200th Division had meanwhile advanced as far as Nangyun railway station, and partially dislodged the Japanese II Battalion of 143 Regiment from their position there. They also sent patrols further south toward Toungoo threatening the Japanese flank and rear. The retreating 200th Division joined them at Yedashe after withdrawing northward on the east bank from Toungoo, crossing the Sittang River east of Nangyun. Subsequently the Chinese withdrew to a new defensive positions at Yedashe, to continue to block the Japanese advance up the Sittang River Valley.

大家英文应该看得懂的，我就不翻译了，我比较懒。@幻尘的雪

地名对照
Loikaw 罗衣考
Lashio 腊戌
Pyu 皮尤
Oktwin 奥德文
Sittang river 锡唐河
Nangyun 南阳

1942年3月8日，在日军攻占仰光同时，200师赶到了同古战场，从此以后，中国的200师接替了英国人在同古的主要防御工事,同古坐落于西塘河边，是克伦邦西部的门户，公路直通曼德勒 罗衣考与腊戌。......戴安澜决定将摩托化团与598团，放置于同古以南35英里的皮尤河边。（双手码字真的有点累）

10天后，日军第55师团先头部队抵达同古附近的根河开始了战斗，200师机械化部队在此地拖延了日军步伐整整三天。与此同时，日军寻求在奥德文寻求突破，结果仍然遭到了中国军队两天的阻击。

这个是日本《缅甸作战》东吁战役全记录

还有

关于东吁战役时间界定问题，盟军与日军的标准也是不一致的，按照日本人的说法，战役是从3月26日，也就是第56师团搜索联队的加入总攻才开始的。
然而，中国人与美国人是从日军开入皮尤河的3月18日作为战役起点的。
芭芭拉 塔奇慢《史迪威与美国在华经验》：“ 二○○师顽强地抵抗十二天，阵亡一千人之后，自己突围出来，跟在二十二师后面撤往以北六十英里的彬马那地区。”
该书有关杜聿明的描述挺有意思的：
“史迪威前往弗拉格斯塔夫大厦礼节性拜会了总督(据史迪威日记记载是多尔曼－史密斯)。总督见一位美国人自称是中国驻缅军队指挥官，颇为吃惊。在这之后不久，第五军的杜聿明将军也以同样身份拜会了他，他更加迷惑不解了。多尔曼－史密斯问杜聿明怎么他们两个人担任同一职务，杜聿明诡秘地笑着回答说：“噢，阁下，那位美国将军只当是让他指挥军队，其实并非如此。您知道，我们中国认为，让美国人继续参战的唯一办法是给他们一些名义上的指挥权。只要我们这样干，他们就不会造成多大危害。”
　　 杜聿明的这番解释提出了东西方之间不断出现的一个问题，这就是，这种相互关系到底哪一面符合实际呢？到底是谁想让谁继续参战？史迪威的职务到底有多大实际意义？这些问题使史迪威在缅甸的指挥权变得象皮兰德娄 ”