The M3 also served with the U.S. Marines in the Pacific Theater of Operations and was first used in the invasion of Saipan. It proved highly effective against the Type 95 Ha-Go and the Type 97 Chi-Ha, in the fight against the Japanese 9th Tank Regiment on Saipan. It also served in the Battle of Peleliu and the Battle of Okinawa, and many other conflicts in the Pacific.