Richard O'Neill is a writer and editor who has specialized in military history for the past 40 years. He is the author of Suicide Squads, a history of the weapons and missions of the Special Attack units of World War II. He has contributed to many books on weaponry and military history, including The Complete Encyclopedia of 20th Century Warships, The Vietnam War and, most recently, An Illustrated History of the Royal Navy. He was a major contributor to Lands And Peoples, a multi-volume educational work, and wrote Presidents of the United States for the Facts America series. He is also the author of The Middle Ages and World War II for the "Historical Facts" illustrated series.