M-109 155mm Self-propelled Howitzer

The M109 series of 155mm self-propelled howitzers was first introduced in 1962, replacing the M44 155mm self-propelled howitzer. The M109 was used in the Vietnam War. Continually upgraded and improved, it is still the primary indirect fire support weapon of maneuver brigades of armored and mechanized infantry divisions.

Today in WW II: 9 Feb 1941 British Prime Minister Winston Churchill appeals for arms shipments from the US: "Give us the tools, and we will finish the job". More ↓

9 Feb 1943 Allied forces capture Guadalcanal, Solomon Islands.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

M-109 155mm Self-propelled Howitzer (Paladin)

The first model M109 had a very short barrel tipped with a double baffle muzzle brake and with a large fume extractor (bore evacuator) mid-barrel. The versions deployed to Southwest Asia were the M109A2 or later models with a longer gun tube than the M109 or M109A1 varients.

The M109A2, M109A3 and M109A4 howitzers used the M185 cannon with a range of 23,500 meters. The range was increased to 30,000 meters with the M109A5 and M109A6 by replacement of the M185 23 caliber long barrel with the M284 cannon 39-caliber barrel.

The M109A6, named the Paladin, is the latest variant of the M109 series, the result of an improvement program completed in 1990. The Paladin's improvements included a new cannon with a 25 percent increase in maximum range to 30 kilometers, improved crew protection against artillery fragmentation and nuclear, biological, and chemical (NBC) hazards, automatic fire control, a position-locating device, SINCGARS radios, driver's night vision capability, and built-in test equipment. The Army planned to procure 824 Paladins, and production began in October 1991.

The M-109 155mm Self-propelled Howitzer fires a variety of 98 pound 155mm munitions including High Explosive, Illuminating, Smoke, Rocket Assisted and Laser Guided. It can carry 22 rounds of separate loading 155mm ammunition and 500 rounds of machine gun ammo for the M2 .50 caliber machine gun mounted on top.

The 55,000 pound M109 has a maximum road speed of 35 mph, with a driving range of nearly 220 miles without refueling. The M109 is used extensively by NATO forces and other countries such as Israel and Saudi Arabia.

M-109 155mm Self-propelled Howitzer. Photo: Zupanja, Croatia, 1996.

M-109A2 at 1st Cavalry Museum, Ft. Hood, TX, 2 December 2005. Photo: Courtesy of Bob Pettit.

M-109 155mm Self-propelled Howitzer on transporter, Interstate 20, Ft. Worth, TX. Photo: Courtesy of Bob Pettit
M-109 155mm howitzer on transporter, Interstate 20, Ft. Worth, TX. Photo: Courtesy of Bob Pettit.

Two M-109 howitzers on transporters, 2005. Photo: Courtesy of Bob Pettit.