Despite obsolescence brought on by new developments in artillery design, large numbers of 75s were still in use in 1939 (4,500 in the French army alone), and they eventually found their way into a number of unlikely places.
Some French guns were modernized between the wars, in part to adapt them for anti-tank fire, resulting in the Canon de 75 Mle 1897/33 which fired a high-explosive anti-tank shell.