Battle proven in Vietnam, the M113 enabled a ten-man squad of infantry to travel behind protective armor in an amphibious vehicle that carried sufficient weapons to be considered an offensive weapons system. Its ability to ford streams or even cross lakes made it an extremely useful vehicle in the waterlogged jungles of Vietnam.

AS experience was gained with the use of the M113 in combat, numerous modifications were made to tlw vehicle to increase both its firepower and crew protection features.

M 132 self-propelled flame-thrower was used by U.S. Army and ARVN units. M132 had a small turret equipped with a flamegun and machine gun, A number Of M113s were also used during the Vietnam war by the Australian armored units. They decided to mount a T50 Cadillac Gage machine gun turret.