In September 1945, 20,000 British troops of the 20th Indian Division occupied Saigon under the command of General Sir Douglas David Gracey. During the Potsdam Conference in July 1945, the Allies had agreed on Britain taking control of Vietnam south of the 16th parallel (then part of French Indochina) from the Japanese occupiers. Meanwhile, Ho Chi Minh proclaimed Vietnamese independence from French rule and major pro-independence and anti-French demonstrations were held in Saigon. Ho Chi Minh was the leader of the communist Viet Minh. The French, anxious to retain their colony, persuaded Gracey's Commander in Chief, Lord Mountbatten, to authorise Gracey to declare martial law. Fearing a communist takeover of Vietnam, Gracey decided to rearm French citizens who had remained in Saigon. He allowed them to seize control of public buildings from the Viet Minh. In October 1945, as fighting spread throughout the city, Gracey issued guns to the Japanese troops who had surrendered. He used them