The Battle of Luzon was the largest campaign of the Pacific War which was fought between the United States, Mexico, Australia, the Philippines, and Japan. It was part of General Douglas MacArthur's bid to fulfill his promise and reclaim the Philippines. The invasion of Luzon began on December 9, 1945 and lasted until June 30, 1945 when the Philippines had finally been declared secured. The campaign proved to be exceedingly damaging to the Japanese with about 230,000 total casualties. American casualties meanwhile consisted of about 10,360 Americans killed and 36,550 wounded.