The 1st and 3rd Amphibious Tractor Battalions were deployed as part of the 1st Marine 
Division to South Vietnam in 1965.  A battalion is made up of 2 Amtrac companies, each
with 4 Amtrac platoons.  An Amtrac company could transport an entire battalion of Marines.
It is important to keep this in mind when purchasing these formations.
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Technically the company HQ of the Amtrac companies should have 8 vehicles, but this
was impossible since 8 vehicles plus four platoons is more than the maximum ten units
per formation.  The three LTVP5 (CMD) command vehicles were stripped from the
formation to get it to fit.