||On the one hand, it has cooperated with Chinese authorities to comprehensively strengthen spy activities in Myanmar; On the one hand, it sent a small commando force to cross the Burmese border to launch a guerrilla war, with the slogan of "expelling the British and recovering the motherland", with the intention of setting off a nationwide anti-British uprising again.

Judging from the documents seized by the British colonial authorities afterwards, the activities carried out in the early stages of the restoration were very effective. The series of "terrorist" incidents such as cutting wires, attacking vehicles, and assassinating officials affected the movement of British troops to a certain extent, causing a lot of panic among the colonial authorities and British expatriates, and the anti-British uprisings that broke out in various places directly restrained a considerable number of British troops, making it impossible for them to smoothly carry out defensive preparations against the allied forces in East Asia.

In late 2, with the successful conclusion of the Indochina Campaign, the Burma Offensive Operation was launched as scheduled, and General Xiao Ruhai's Burmese Front Army was divided into two groups to attack from the north and west at the same time.

The North Group, that is, the 4th Reserve Light Infantry Division of the 21st Group Army, with two infantry battalions as the lead, planned to attack from Tengchong and the first line on the Burmese border, and its main force attacked and advanced to the old capital of Myanmar (Mandalay) through Lashio, cutting off the British army's northward retreat, and crossing the Irrawaddy River through Bamo to attack Myitkyina, a key place in northern Myanmar leading to India. On the one hand, due to the inconvenience of supplies, it was taken into account from the outset that it was necessary to rely on the strength of the re-guerrillas and underground organizations to raise supplies on the spot as much as possible.

The 31st Army of the 31st Army has two standing infantry divisions and two light infantry divisions, two infantry battalions and a number of special service detachments, and two divisions of the 2nd Siam Army.

On the one hand, the absolute main force of the 57th Army, an elite unit that conquered Hong Kong by lightning, was assembled, with a considerable number of engineers and mules and horses. Ji Lu crossed the Mae Kong River from the Siam-Burmese border and quickly captured Mawlamyine, Myanmar's second-largest port city, and used this as a basis to sweep along the coast towards Yangon.

The other corps of the 31st Army, the 74th Army and the 57th Army, crossed the river later, but did not attack Mawlamyine directly, but quickly detoured back to Baan to the north of Mawlamyine to prevent the British from moving south to reinforce Mawlamyine.

In order to cooperate with the above actions, the Siam 2nd will first launch an attack on the southern section of the Burmese border and other coastal points such as Tanlao Mekit, Dawei, and Yacheng, to contain the British forces and clear the left flank of the main direction of attack. At the same time, cut off the land support of the British army to Malaya from the Indo-Burmese side.

The Fifth Air Group, which was attached to the Front, had 13 combat squadrons, together with 54 direct and counter fighters, 35 reconnaissance and liaison planes, 58 light bombers, and 6 transport planes.

218, the Luo army on the southern front was the first to cross the border, and a week later advanced to Dawei, and the British then launched a counterattack. The two sides fought fiercely near Dawei, and the Siamese army, equipped with Chinese weapons, apparently failed to replicate the squadron's will to fight. Soon the humiliating scene of repeated defeats in the attack on French Indochina was repeated.

On the 226th when the Battle of Dawei entered the **, the 57th Army 113, which had been the first to cross the sea and land on Hong Kong Island, took the lead in crossing the Kong River this time, and with the close air support of the Fifth Air Group, it broke through the British army's river defense on the same day, and occupied the border town of Gaojia in the west of the river the next day, entered the Mawlamyine area, and fought fiercely with the 7th Division of the British and Indian Army garrisoned here.

On 311, the 74th vanguard of the Chinese army advanced to Ba'an, and the British and Indian troops on Mawlamyine's side were in danger of being encircled on three sides and were forced to move north. The retreat to Ba'an was soon interspersed with detours by the follow-up troops of the 7th Army, and had to retreat to Billing.

After 315, the main forces of the Chinese army successively crossed the Salween River. Beginning a roundabout encirclement of Billing's enemy, the British were forced to abandon Billing on the 317th and retreat to the Sidtang River.

There is only one bridge over the 450-meter-wide Sitang River. The road to the bridge in the east of the river has long been blocked by the advance troops of the Chinese army who have taken a detour from the path, and the British army has repeatedly concentrated their forces to storm the bridge, but they are unable to approach the bridge.

Unexpectedly, the headquarters of the 11th Division of the British and Indian Army, which was guarding the bridge, was attacked by the Chinese commandos and guerrillas in front and back, and thought that the 7th Division had no hope of escaping, so in order to prevent the bridge from falling into the hands of the enemy, it blew up the bridge over the Siddang River in 320.

As a result, when the headquarters of the 7th Division of the British and Indian Army arrived at the river bank lightly, they could neither escape nor fight, the Chinese planes continued to detect and bomb during the day, and the Burmese guerrillas kept sneaking attacks at night, the food and ammunition were cut off, and the enemy was on all sides, and they struggled to 323, and the desperate Lieutenant General Lindeman finally led nearly 10,000 officers and soldiers to surrender to the 74th Army of the Chinese Army that surrounded them, and only the 21st Brigade was unwilling to be killed. Although the Chinese army and Burmese guerrillas were sniped at various levels, more than 2,000 people successfully crossed the Sitang River and reached Bago - these 2,000 "naked soldiers" who had little left except their military uniforms were all the survivors of the original 16,000-strong Anglo-Indian 7th Division after the battle.

After the Battle of the Siddang River, only one regiment of the Anglo-Indian 11th Division remained in southern Burma that was still fighting at the British Army, and in the face of the aggressive offensive of the four divisions of the Chinese Army, the division abandoned Bago and Rangoon one after another, one by train retreated to Taungoo and Pyinmana in the upper reaches of the Siddang River, and the other fled by boat to Repotan and Pynea in the upper reaches of the Irrawaddy River.

On the 326th, the Chinese army entered Bago, and the 30,113 vanguard captured Rangoon, capturing a large amount of supplies that the British had not been able to transport, and more importantly, opening the gateway to the whole of Burma and obtaining a good port for supply by sea.

At the same time as the southern Burma battle began, the Chinese 70th Army assembled in Yunnan successfully broke through the British defense line in front of them, and quickly advanced along the road to Lashio, capturing Lashio in 314. On March 25, the 70th Vanguard advanced to the vicinity of Mandalay and engaged in a fierce battle with the 1st Division of the British and Indian Army, which had just arrived.

On the other hand, the 79th Army, which arrived at Lashio after the 70th Army, turned to the northwestern Bhamo Army, and on 327 entered Bhamo on the banks of the Irrawaddy River, and then marched north to Myitkyina, an important town in northern Burma, preparing to capture Mandalay from the north and cut off the retreat of the British army in Burma.

In the fourth part, with the successive losses of important places such as Pimmana and Pyinmana on the southern road and Myitkyina on the northern road, the main force of the 70th Army of the Chinese army has moved from the direction of Lashio to the vicinity of Mandalay and assembled: the main force of the British army near is about to fall into the dangerous situation of being surrounded on three sides, and the commander-in-chief of the British army in Burma, General Beford, was forced to give an order to abandon Mandalay, and the whole army withdrew to India by two routes.

424, the 70th entered Mandalay, and in 513, the division of the Ministry of Defense, which attacked from the direction of Myitkyina, entered the key pass of the Indo-Burmese border, and thus the whole territory of Burma was liberated.