During the war, Gatsby reached the rank of Major in the U.S. 16th Infantry Regiment, and was decorated for valor for his participation in the Marne and the Argonne. After the war (as he also tells Nick Carraway years later), he briefly lived in the United Kingdom, where he attended Trinity College, Oxford. Nonetheless, he objects to being called an "Oxford man." "I only stayed five months", he explains to Tom Buchanan. "That's why I can't really call myself an Oxford man". While there, he received a letter from Daisy, telling him that she had married the wealthy Tom Buchanan. Gatsby then decided to commit his life to become a man of the kind of wealth and stature he believed would win Daisy's love.