M1A1

United States tank

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

June 17, 2026

Quick Summary

The M1A1 Abrams is a heavily armored military tank produced in the United States. It is named in honor of General Creighton Abrams, an American army officer and one of the most effective tank commanders during World War II.12

Key features of the M1A1 include:
* Armament: The M1A1 version, developed in the 1980s, is equipped with a 120-mm gun.3
* Survivability: The tank is designed with internal compartmentation and fire suppression systems to protect its crew.1

The development of tanks like the M1A1 was influenced by the need to counter enemy tanks and the evolving landscape of warfare, including the advent of nuclear weapons and the threat posed by large armored forces.3

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

3 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

tank
Gun calibre
…the 1970s, but the subsequent M1A1 version of the 1980s was rearmed with a 120-mm gun originally developed in West Germany for the Leopard 2 tank. The British Challenger, introduced in the 1980s, was also armed with 120-mm guns, but these were still of the rifle type.
Read More
…the 1970s, but the subsequent M1A1 version of the 1980s was rearmed with a 120-mm gun originally developed in West Germany for the Leopard 2 tank. The British Challenger, introduced in the 1980s, was also armed with 120-mm guns, but these were still of the rifle type.
Read More