Friedrich admits that Germany initiated bombing of civilians in the UK by bombing London, although he claims the first raid was accidental, thereby leaving Britain as the first nation to deliberately bomb nonmilitary targets. This entirely ignores the German bombing of English cities during the First World War, using Zeppelin and other rigid airships. In April 1937, during the Spanish civil war (1936–1939), German airplanes bombed the town of Guernica, which had no military use or value.