Lieutenant General Timothy Joseph Maude, USA (November 18, 1947 – September 11, 2001) was the highest ranking military officer killed in the September 11, 2001 attacks and the most senior U.S. army officer killed by enemy action since Simon B. Buckner in 1945. Maude had been serving as the U.S. Army's Deputy Chief of Staff for Personnel and was at a meeting when American Airlines Flight 77 crashed into the west side of The Pentagon. His offices had just days before been moved to the most recently renovated section of the Pentagon.