On 20 October 1944, the U.S. Sixth Army began landing on Leyte's eastern coast, supported by the U.S. Navy's 3rd and 7th fleets, which were assisted by ships from the Royal Australian Navy. The Japanese were aware that the Americans were poised to attack the Philippines and planned to draw the American warships into one last great battle to try and stave off the otherwise inevitable defeat. Over the course of the following three days, the two naval forces engaged in four separate engagements. Involving more than 360 ships and 200,000 naval personnel, the battle was the greatest naval encounter of the World War II and possibly the largest naval battle in history.