M109A1s

The M109A1 is an American self-propelled howitzer that entered service in 1973. It is an upgrade to the original M109 howitzer, featuring a more powerful 155mm M185 howitzer in place of the M109's M126. This enhanced firepower significantly improved its range and accuracy. The M109A1 retained the same chassis and general layout as its predecessor, maintaining commonality of parts and crew training. Its primary role is to provide indirect artillery fire support for armored and infantry units.

The M109A1 is equipped with a crew of four, consisting of a commander, gunner, loader, and driver. It can carry a limited amount of ammunition onboard, typically around 28 rounds. The vehicle is armored to provide protection against small arms fire and shell fragments. While not intended for direct combat, its armor offers a degree of survivability in forward areas. The M109A1 has seen extensive use by the U.S. Army and numerous allied nations, participating in various conflicts. It has been subject to further upgrades over its service life, leading to variants like the M109A2 and subsequent models. Despite its age, the M109A1's robust design and significant firepower made it a capable artillery piece for many years.