Loren Douglas Hagen (February 25, 1946 – August 7, 1971) was a United States Army Special Forces officer and a recipient of the United States military's highest decoration—the Medal of Honor—for his actions during the Vietnam War as Recon Team (RT) leader of a small special reconnaissance unit "RT Kansas", manned by USASF Green Berets and highly trained Montagnard commandos from Task Force One Advisory Element aka Command & Control North, a division of Studies and Observations Group in the Vietnam War.

Hagan's special reconnaissance team had landed and secured their position for the overnight mission almost within sight of the Hanoi High Command's most critical new venture of late 1971, the first six-inch fuel pipeline laid across the Vietnamese DMZ, which was essential a few months in the future when entire tank battalions rolled through the area for the Vietnam War's largest offensive.

During an enemy attack on August 7, in an assembly area of the North Vietnamese Army in the A Shau Valley of the Republic of Vietnam, Hagen led his small recon team's defense, and when USASF Sgt.

1st Lt. Hagen immediately began returning small-arms fire upon the attackers and successfully led this team in repelling the first enemy onslaught.

He then quickly deployed his men into more strategic defense locations before the enemy struck again in an attempt to overrun and annihilate the beleaguered team's members.

The courageous actions and expert leadership abilities of 1st Lt. Hagen were a great source of inspiration and instilled confidence in the team members.