For extraordinary heroism while serving as Executive Officer of Company C, First Battalion, Fourth Marines, Third Marine Division, in connection with operations against the enemy in the Republic of Vietnam. During the period 1 to 6 March 1969, Company C was engaged in a combat operation north of the Rockpile and sustained numerous casualties from North Vietnamese Army mortars, rocket-propelled grenades, small arms, and automatic weapons fire. While continuing to function effectively in his primary billet, First Lieutenant Marlantes skillfully combined and reorgainzed the remaining members of two platoons, and on 6 March initiated an aggressive assault up a hill, the top of which was controlled by a hostile unit occupying well-fortified bunkers. Under First Lieutenant Marlantes’s dynamic leadership, the attack gained momentum which carried it up the slope and through several enemy emplacements before the surprised North Vietnamese force was able to muster determined resistance. Delivering a heavy volume of fire, the enemy temporarily pinned down the friendly unit. First Lieutenant Marlantes, completely disregarding his own safety, charged across the fire-swept terrain to storm four bunkers in succession, completely destroying them. While thus engaged, he was seriously wounded, but steadfastly refusing medical attention, continued to lead his men until the objective was secured, a perimeter defense established, and all other casualties medically evacuated. Then, aware that all experienced officers and noncommissioned officers had become casualties, he resolutely refused medical evacuation for himself. His heroic actions and resolute determination inspired all who observed him and were instrumental in a decisive rout of the North Vietnamese Army force with minimal friendly casualties. By his courage, aggressive fighting spirit, and unwavering devotion to duty in the face of grave personal danger, First Lieutenant Marlantes upheld the highest traditions of the Marine Corps and the United States Naval Service.