While the Burmese independence fighters led by Aung San initially cooperated with the Japanese to oust the British, with the Japanese promising to grant independence to Burma in exchange, it soon became apparent that the Japanese promises of independence were empty. The Japanese occupation was very brutal, and many Burmese were killed, such as in the Kalagong massacre. Aung San subsequently switched allegiance and helped the British win Burma back from the Japanese. Aung San subsequently led negotiations with the British for Burmese independence after the end of World War II, and the British agreed in 1947 to grant independence to Burma the following year, though Aung San himself was assassinated later in the year and never lived to see his dream come true. Independence from the British under the name Union of Burma was finally attained in 1948, and till this day, Aung San is regarded by most Burmese people to be the father of independence.