27 March 1948: Key West Agreement gives the Marine Corps the Primary Amphibious Warfare role.
27 March 1953: The 5th Marines, supported by the 2d Battalion, 7th Marines, in the first full day of fighting after the Chinese assault the previous evening of Outpost Vegas on Korea's western front, counterattacked to regain enemy-held positions. Companies E and F of 2/7, down to only three platoons between them, managed to regain partial control of Outpost Vegas that day.