Kind of vague about the details isn't it? Bert Waldron made 109 confirmed kills as a sniper in the Mekong Delta area.....in five months.

WALDRON, ADELBERT F.
(First Award)
Sergeant, U.S. Army
Company B, 3d Battalion, 60th Infantry Regiment, 9th Infantry Division
Date of Action: January 16 - February 4, 1969
Synopsis:
The Distinguished Service Cross is presented to Adelbert F. Waldron, Sergeant, U.S. Army, for extraordinary heroism in connection with military operations involving conflict with an armed hostile force in the Republic of Vietnam, while serving with Company B, 3d Battalion, 60th Infantry, 9th Infantry Division. Sergeant Waldron distinguished himself by exceptionally valorous actions during the period 16 January 1969 to 4 February 1969. His extraordinary heroism and devotion to duty were in keeping with the highest traditions of the military service and reflect great credit upon himself, his unit, and the United States Army.
HQ US Army, Vietnam, General Orders No. 1068 (1969)
Other Award: Distinguished Service Cross w/OLC (Vietnam)

WALDRON, ADELBERT F.
(Second Award)
Sergeant, U.S. Army
Company B, 3d Battalion, 60th Infantry Regiment, 9th Infantry Division
Date of Action: February 5 - March 29, 1969
Synopsis:
The Distinguished Service Cross (First Oak Leaf Cluster) is presented to Adelbert F. Waldron, Sergeant, U.S. Army, for extraordinary heroism in connection with military operations involving conflict with an armed hostile force in the Republic of Vietnam, while serving with Company B, 3d Battalion, 60th Infantry, 9th Infantry Division. Sergeant Waldron distinguished himself by exceptionally valorous actions during the period 5 February 1969 to 29 March 1969. His extraordinary heroism and devotion to duty were in keeping with the highest traditions of the military service and reflect great credit upon himself, his unit, and the United States Army.
HQ US Army, Vietnam, General Orders No. 2904 (1969)
Other Award: Distinguished Service Cross (Vietnam)