From the fearsome jungles of Vietnam to the vast deserts of Yemen, the M109 Paladin has served in the US military as the prime self-propelled artillery support vehicle for American divisions. Moreover, the system has also equipped 40 countries worldwide, including several NATO allies.Its impressive main armament consists of the M126 155-millimeter howitzer, and the vehicle also has state-of-the-art night-vision equipment and a kit to provide amphibious capabilities.Ironically, the noble medieval bodyguard fully modernized the western standards and redefined how self-propelled howitzers should be in the 21st century.And its trailblazing history is expected to continue with a current comprehensive overhaul, starting with the most recent M109A7 upgrade that will define whether the signature howitzer will remain on top of the world…