Battle of FSB Mary Ann

Part of the Vietnam War

Date	March 28, 1971
Location	15°18′20″N 108°6′37″E / 15.30556°N 108.11028°E / 15.30556; 108.11028 (FSB Mary Ann)Coordinates: 15°18′20″N 108°6′37″E / 15.30556°N 108.11028°E / 15.30556; 108.11028 (FSB Mary Ann) Quảng Tín Province, South Vietnam MGRS AS 962-998
Result	Viet Cong victory

Belligerents

United States

South Vietnam

Viet Cong

Commanders and leaders

William P. Doyle

Unknown

Units involved

23rd Infantry Division "Americal"

1st Battalion, 46th Infantry Regiment

2nd ARVN Division

Battery B, 22nd Field Artillery

Military Region 5

409th VC Main Force Sapper Battalion

Strength

231 U.S.

21 ARVN

~50

Casualties and losses

33 KIA,
83 wounded

15 found dead

23rd Infantry Division "Americal"

2nd ARVN Division

Military Region 5

231 U.S.

The Battle of FSB Mary Ann occurred when Viet Cong sappers attacked the U.S. firebase located in Quảng Tín Province, South Vietnam early on the morning of 28 March 1971.

Fire support base (FSB) Mary Ann was located to interdict movement of enemy troops and materiel down the K-7 Corridor and Dak Rose Trail (branches of the Ho Chi Minh trail running from Laos to the coast of South Vietnam). Originally intended to be a temporary base, it evolved into a more permanent location garrisoned by at least one company of U.S. ground forces. The base was manned by 231 American soldiers at the time of the attack.

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Wikipedia