Complex sentence: The division was formally disbanded in India on August 31,1945, but most of its units/troops were stationed in Sumatra at Padang and Medan until November 1946; they embarked at the port of Belawan for India to be disbanded.
Split into simpler sentences: The division was formally disbanded in India on August 31,1945. In November 1946 they embarked at the port of Belawan for India to be disbanded.