The answer to the crossword for the term W.W. II GEN. ___ ARNOLD is HAP, which stands for General Henry H. Arnold. He was an American military officer who served as the Commanding General of the United States Army Air Forces during World War II. He was one of only two five-star generals in the history of the U.S. Air Force and is considered the father of the U.S. Air Force. He was also the first airman to hold a five-star rank.