Which General led the American forces in World War II on the Pacific front?

MacArthur.

October-December 1944: Leyte

In October 1944, General Douglas MacArthur and his Sixth Army returned to the Philippines by way of the island of Leyte. More than two and a half years had passed since MacArthur had reluctantly abandoned his troops in the Philippines, retreating to Australia, where he had vowed, "I shall return." After he waded ashore MacArthur delivered his famous "I have returned" speech. Offshore the U. S. Navy and the Imperial Navy waged the largest naval battle in the history of warfare. The Battle of Leyte Gulf destroyed the Japanese Navy as an effective fighting force. It was during this battle that U. S. sailors first witnessed the kamikaze attacks that would become commonplace five months later in the battle of Okinawa. As many as sixty-five thousand Japanese soldiers died defending Leyte. More than 15,000 Americans were killed or wounded.