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The M198 howitzer is a medium-sized, towed artillery piece, developed for service with the United States Army and Marine Corps. It was commissioned to be a lightweight replacement for the WWII-era M114 155mm howitzer. It was designed and prototyped at the Rock Island Arsenal in 1969 with firing tests beginning in 1970 and went in to full production there in 1978. It entered service in 1979 and since then 1,600 units have been produced and put into operation.

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The M114 155 mm howitzer was a towed howitzer used by the United States Army. It was first produced in 1942 as a medium artillery piece under the designation of 155 mm Howitzer M1. It saw service with the US Army during World War II, the Korean War, and the Vietnam War, before being replaced by the M198 howitzer.

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Marines from Mike Battery, 4th Battalion, 14th Marines an activated reserve artillery unit, operate the 155 mm M198 howitzer in November 2004 supporting Operation Phantom Fury.

from Washington Post

Video: Islamic State fighters appear to fire U.S.-made M198 Howitzer artillery

#WashingtonPostCheckpoint ...... Video: Islamic State fighters appear to fire U.S.-made M198 Howitzer artillery..... http://www.washingtonpost.com/news/checkpoint/wp/2014/08/27/video-islamic-state-fighters-appear-to-fire-u-s-made-m198-howitzer-artillery/

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