"For
extraordinary heroism while serving as a Machine Gun Squad
Leader with Company M, Third Battalion, Fifth Marines,
First Marine Division (Reinforced), in the Republic of
Vietnam on the afternoon of 8 November 1967.
During
Operation Essex, Corporal Duncan's company was attempting
to seize a small but heavily fortified village in Quang
Nam Province when it suddenly came under intense mortar
and automatic weapons fire which killed the acting platoon
commander and seven other Marines, and temporarily pinned
down the lead platoon in a rice paddy.
Quickly
assessing the situation, Corporal Duncan displayed unusual
courage, leadership and composure under fire, as he maneuvered
his machine gun team across the open area to a position
behind a dike. He directed a heavy volume of fire against
the North Vietnamese Army force, suppressing its fire
sufficiently to enable the Marines lying in the open field
to move to relatively safe positions. As he was moving
his team back to rejoin the platoon, he was painfully
wounded.
When
a defensive perimeter was established and his squad was
assigned to provide cover for the left flank, he ignored
his own injury as he deployed his men and moved along
the perimeter to insure their firing positions provided
maximum security for their sector against hostile attacks. As
darkness fell, the enemy force launched an assault but
was repulsed by the extremely heavy volume of fire from
Corporal Duncan's team. The enemy then commenced a grenade
attack to destroy the Marines' firing positions.
Observing
one of his men completely exposed to the incoming grenades,
Corporal Duncan, completely disregarding his own safety
and intense pain of his wound, moved to aid his fellow
Marine. When a grenade landed nearby, he fearlessly used
his own body to shield the man. He
repeatedly exposed himself to the enemy's fire, as he
moved into the open to deliver covering fire while the
squad reached more secure positions.
After all members of his team had reached safety, Corporal
Duncan was mortally wounded as he advanced to join his
men at the new position. His bravery and daring actions
throughout the engagement inspired his men to steadfastly
maintain their position and repulse the fanatical enemy
assault. By
his courageous fighting spirit, bold initiative and unswerving
devotion to duty at great personal risk, he upheld the
highest traditions of the Marine Corps and the United
States Naval service. He gallantly gave his life for his
country."