The little training (or in many cases, no training at all) that the men of the nascent Philippine Army received between September 1941 and December 1941, would turn out to be all they would take to battle against the menace that was to befall the Philippine Islands. As late as December 1, 1941, only about two-thirds of the 41st Division had been called into active service. Only a few days later, on December 7, 1941 (December 8, 1941 in Asian time zones), Japan launched an attack on Pearl Harbor. Within a matter of hours of each other, Japanese forces also commenced attacks on Guam, Wake Island, the British crown colony of Hong Kong, Thailand, Malaya, and the Philippines.