In total, 64,242 units of the Unimog 404 were produced, which makes it the Unimog with the highest production figure. 36,638 Unimog 404 were purchased by the German Bundeswehr. Apart from the Bundeswehr, many different military forces have either used the Unimog in the past or still make use of it today. In addition to the military series 404, several civilian models have been adapted for military use. In Argentina, the series 426, actually a version of the civilian series 416 produced under licence, was made for the Argentinan, Chilean, Peruvian and Bolivian military. In total, 2643 units of the series 426 were made. The Argentinian made Unimog 431, which was a licensed version of the civilian series 421, was also used as a military vehicle, mainly as a self-propelled howitzer. Another civilian Unimog that was mainly used a military vehicle, is the series 418.