David Hapgood and David Richardson, Monte Cassino: The Story of the Most Controversial Battle of World War II, page 211 (1984, 2002), Da Capo, Cambridge, Mass. Bombs that fell short of site killed some Allied troops on ground below, while 16 bombs were mistakenly dropped at the Fifth Army headquarter compound 17 miles away, exploding yards from General Clark's trailer while he was at his desk inside.