Bradley, Omar Nelson (1893-1981), commanded the largest fighting force ever amassed in battle under the American flag. His troops swept through France, Belgium, the Netherlands, Germany, Austria, and Czechoslovakia during World War II (1939-1945). Bradley's Twelfth Army Group consisted of the United States First, Third, Ninth, and Fifteenth armies--about 1 million men, organized in over 40 combat divisions. Bradley's brilliant military leadership and concern for his men made him one of the most popular wartime generals.