1942 In May, the Sino-British allied forces were defeated in the defensive operations in Myanmar, and the British army was defeated in India. Most of the Chinese expeditionary forces returned to western Yunnan, and one of them entered India through the cross-country mountain in northern Myanmar. The Japanese army occupied Myanmar. In order to get through the Sino-Indian Highway, China officially started its counterattack in North Myanmar from June 1943 to June 10 according to the operational plan put forward by the Allied Southeast Asia Theater Command.