They served from August 1936 to the end of the conflict in March 1939. Altogether a total of 758 airplanes were sent:
GUERNICA REMEMBERED ; the Bombing of a Spanish Market Town in 1937 Inspired One of the World's Most Famous Paintings. Seventy Years on, Reports Graham Keeley, Picasso's Anti-War Legacy Is the Subject of a New Furore
Apr 26, 2007; It was a busy market day in a small town then little known beyond Spain. The central square was alive with the chatter of the...