Fire support base

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A fire support base (FSB or firebase) is a military encampment designed to provide artillery support to infantry operating in areas beyond the normal range of fire support from their own base camps. FSBs were used extensively by the U.S. during the Vietnam War.

[edit] Components during Vietnam War

Mainly a permanent encampment, though many were dismantled when the unit it supported moved. Main components varied by size. Small bases usually had six 105 millimeter howitzers, one platoon of engineers permanently on station, Landing Zone (LZ), Tactical Operations Center(TOC), aid station staffed with medics, communication bunker and one battalion of infantry. Large FSBs had everything a small one would have and a medium artillery position (155 mm), a piece of self-propelled artillery and an infantry division.