The event familiarly known as “Pearl Harbor” was in fact an all-out lightning strike on U.S. and British holdings throughout the Pacific. On a single day, the Japanese attacked the U.S. territories of Hawai‘i, the Philippines, Guam, Midway Island, and Wake Island. They also attacked the British colonies of Malaya, Singapore, and Hong Kong, and they invaded Thailand. It was a phenomenal success. Japan never conquered Hawai‘i, but within months Guam, the Philippines, Wake, Malaya, Singapore, and Hong Kong all fell under its flag. Japan even seized the westernmost tip of Alaska, which it held for more than a year.
Daniel Immerwahr in How to Hide an Empire