Officials in Japan said they lodged a "strong" protest with the United States.
Lance Cpl. Chukwuemeka E. Oforah, 21, fell into the water on Saturday while assigned to 3rd Battalion, 6th Marines out of Camp Lejeune, North Carolina.
"His honorable service to his country will not be forgotten." A U.S. Marine who died during a training exercise Wednesday at Camp Pendleton has been identified as 21-year-old Private First Class Tanner Rubio from Dixon.
Members of the U.S. military have the legal right to refuse orders they believe are unlawful, but they risk violating military laws of obedience if the order is in fact lawful, experts in military law say.
According to California Highway Patrol, the explosive ordinance that was fired over the freeway detonated overhead prematurely, striking and damaging a patrol vehicle.
A 17-mile stretch of Southern California freeway was shut down Saturday because of a military event involving live ammunition at Camp Pendleton.