General Mark Milley is a senior military officer in the United States Army, serving as the 20th Chairman of the Joint Chiefs of Staff since September 2019. He has played a crucial role in advising the President and the Secretary of Defense on military matters and strategy. Milley previously held various leadership positions, including Chief of Staff of the Army and Commanding General of the U.S. Army Forces Command. Born on June 18, 1958, in Winchester, Massachusetts, Milley graduated from Princeton University and was commissioned as an officer in 1980. He has served in multiple combat operations, including in Iraq and Afghanistan, and is known for his extensive experience in military leadership and strategic planning.