The M-108 self-propelled artillery wound up being introduced, inside very early '60s, to satisfy a specific need of U.S. Army: develop a high freedom howitzer able to replace the aging M52. The M-108 flexibility, acquired as a consequence of the effective diesel turbocharged 8-cylinders motor and to the efficient suspension system system, finished up being its main energy. The armament wound up being produced by the 105 mm howitzer and also by one 12.7 mm device gun, suitable for the rooftop, for close security purposes. The answer considering 105 mm howitzer as main gun, but was not consequently effective. U.S. Army decided in fact very soon to consider bigger caliber howitzers characterized by more effectiveness. The M-108 was indeed utilized throughout the Vietnam War nonetheless it wound up being gradually flanked after which replaced by self-propelled 155 mm. and 203 mm. artilleries.