Japanese conquest of Burma main attack westward from Rahaeng in Thailand across the Kawkareik Pass. The 16th Indian Infantry Brigade of the 17th Indian Division guarding this approach retreated hastily westward. The Japanese division advanced to Moulmein at the mouth of the Salween River which was garrisoned by the 2nd Burma Infantry Brigade. The position was almost impossible to defend, and had the River Salween, almost wide, behind it. The 2nd Burma Brigade was squeezed into a progressively tighter perimeter, and eventually retreated over the river by ferry on 31 January after abandoning a large amount of supplies and equipment. Part of the force
Burma Railway Thanbyuzayat in Burma, linking up with existing railways at both places. Its route was through Three Pagodas Pass on the border of Thailand and Burma. of the railway were in Burma and the remaining were in Thailand. The movement of POWs northward from Changi prison in Singapore and other prison camps in Southeast Asia began in May 1942. After preliminary work of airfields and infrastructure, construction of the railway began in Burma on 15 September 1942 and in Thailand in November. The projected or goal completion date was December 1943. Most of the construction materials, including tracks and sleepers, were