Battle of Oktwin March 20–23, 1942, was the second battle in the Battle of Yunnan-Burma Road in the Burma Campaign of World War II and Second Sino-Japanese War. On March 20, the Japanese 143rd Regiment plus cavalry units of the 55th Division attacked the positions of the Chinese 5th Army Cavalry Regiment north of the Kan River, driving the Chinese forces back with heavy losses. The bulk of the cavalry regiment was withdrawn to the north of Toungoo, leaving only a company of cavalry and infantry each to delay the advancing Japanese. Meanwhile, the commanding general of 200th Division, Dai Anlan’s fortifications at Oktwin and around Toungoo were now ready. They were built using timber, which was in abundant supply, and all positions were carefully concealed. On March 21, Japanese forces brus