 In his essay, he stressed the importance of a coordinated amphibious assault and of an execution of an opposed landing, a principal which the Marine Corps were to put into practice in World War II.In 1933, Lieutenant James Rockwell, a native of San Juan, Puerto Rico, became the third Marine of Hispanic (Puerto Rican) descent to graduate from the USNA.PFC Richard I. Trujillo was serving aboard the Battleship when on December 7, 1941, the Japanese attacked Pearl Harbor.