ARMY BIRTHDAY Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, joins Army Secretary John M. McHugh and Army Vice Chief of Staff Gen. Lloyd Austin in celebrating the Army's 237th birthday during a cake cutting ceremony in the courtyard of the Pentagon, June 14, 2012. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 085723-B-RCN92-937.jpg Photo Gallery