老当益壮的M109自行榴弹炮美国陆军的M109型155毫米自行榴弹炮,从它开始批量生产之日算起,已经是有54年“军龄”的老兵。这种大口径的自行榴弹炮于1952年8月开始立项,暂定名为T196式自行榴弹炮,榴弹炮口径为156毫米。考虑到通用性的问题,1956年改为155毫米口径。随即开始了样车和样炮的试制。经过6年的精雕细刻,终于于1962年开始批量生产。1963年7月,正式命名为 Mature self-propelled howitzer M109 US Army M109 155-mm self-propelled howitzer, from the date it began mass production, is already 54 years “military age ” veterans. This large-caliber self-propelled howitzer began its project in August 1952 and was tentatively named the T196 self-propelled howitzer with a howitzer diameter of 156 mm. Taking into account the issue of versatility, in 1956 changed to 155 mm caliber. Then started a sample car and prototype trial. After six years of carving, finally began mass production in 1962. In 1963 July, officially named as