The impact of the Spanish Civil War on a non-combatant populace was depicted in Picasso's masterpiece, "Guernica", showing the bombing of Guernica in 1937; a very different treatment of a similar subject is seen in Henry Moore's drawings of sleeping civilians sheltering from The Blitz bombing on the station platforms of the London Underground. Among official World War II war artists, Paul Nash's "Totes Meer" is a powerful image of a scrapyard of shot-down German aircraft, and the landscapist Eric Ravilious produced some very fine paintings before being shot down and killed in 1942. Edward Ardizzone's pictures concentrated entirely on soldiers relaxing or performing routine duties, and were praised by many soldiers: "He is the only person who has caught the atmosphere of this war" felt Douglas Cooper, the art critic and historian, friend of Picasso, and then in a military medical unit. Photography and film were now able to capture fast-moving action, and can fairly be said to have produced most of memorable images recording combat in the war, and certainly subsequent conflicts like the Vietnam War, which was more notable for specifically anti-war protest art, in posters and the work of artists like Nancy Spero. Contemporary military art is part of the subfield "military and popular culture".