Fort Sam Houston in San Antonio in Bexar County, Texas — The American South (West South Central)

M-3 Antitank Gun 37mm Towed

Photographed by James Hulse, August 18, 2026

1. M-3 Antitank Gun 37mm Towed Marker

Inscription.
Based on a German design and used in Infantry and Antitank Platoons starting in 1939. Prime mover was 1/4 ton truck (Jeep). By 1941, the M-3 was no longer effective against German tanks in service. It saw widespread use in the Pacific as an infantry support gun. More than 18,000 were built.

Weight: 912 lb
Made by: Watervliet Arsenal (1940)
Crew: 6
Ammunition: Armor Piercing
Armor Piercing (Capped)
High Explosive
Cannister
Armor Penetration: 2.1″ at 1,000 yds

Erected by Fort Sam Houston Museum. (Marker Number SAM1662.)

Topics. This historical marker is listed in this topic list: War, World II. A significant historical year for this entry is 1939.

Location. 29° 26.663′ N, 98° 27.667′ W. Marker is in San Antonio, Texas, in Bexar County. It is in Fort Sam Houston. It is at the intersection of Liscum Road and Staff Post Road on Liscum Road. The marker is accessible through the Fort Sam Houston Museum’s outside exhibit. Touch for map. Marker is at or near this postal address: 1405 E Grayson St, Jbsa Ft Sam Houston TX 78234, United States of America. Touch for directions.

Regionally, this marker is in South

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Texas.

It is also in the American South.

Globally, it is in North America,

a Gulf of Mexico state,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once New Spain,

the Republic of Texas,

and one of the Confederate States of America.

Other nearby markers. At least 8 other markers are within walking distance of this marker: M-M2A2 Howitzer 105mm Towed (here, next to this marker); Camp John Wise (a few steps from this marker); M-3A1 Halftrack Personnel Carrier (a few steps from this marker); M-3A1 Scout Car (a few steps from this marker); The Quadrangle Oak (within shouting distance of this marker); Water Features (about 300 feet away, measured in a direct line); The Quadrangle: Quartermaster Depot (about 400 feet away); Cannon and the Tower (about 400 feet away). Touch for a list and map of all markers in San Antonio.

More about this marker. Fort Sam Houston is an active military installation. Appropriate identification is required for access

Photographed by James Hulse, August 18, 2026

2. M-3 Antitank Gun 37mm Towed Marker

Credits. This page was last revised on August 21, 2026. It was originally submitted on August 21, 2026, by James Hulse of Medina, Texas. This page has been viewed 12 times since then. Photos: 1, 2. submitted on August 21, 2026, by James Hulse of Medina, Texas.