It saw service in the Vietnam War, but was quickly withdrawn because it could not keep up with the larger M113s, which also had room for troops, and extra firepower when configured for Armored Cavalry (ACAV, mounting three machine guns and gun shields).
It saw service in the Vietnam War, but was quickly withdrawn to be used in Europe because it could not keep up with the larger M113s, and tended to get stuck because their noses extended beyond the front tracks. The M113 also had room for troops, and extra firepower when configured for Armored Cavalry (ACAV, mounting three machine guns and gun shields).