A group of Spanish national supporters (on the left in mixed uniforms) posing in front of a beaverette armed with an automatic cannon (French model Renault FT17, belonging to the Spanish infantry) in the center of Zaragoza, Aragon, Spain. In the background, passers-by. The Republicans tried to invade Zaragoza in vain in July, 1936. A further offensive failed in September, 1937.