H. R. McMaster, 26th National Security Advisor

Herbert Raymond "H. R." McMaster is a United States Army lieutenant general and currently National Security Advisor. His immediate past military assignment was as Director of the Army Capabilities Integration Center, and Deputy Commanding General, Futures of the U.S. Army Training and Doctrine Command.

McMaster's prior assignments include Commanding General, Ft. Benning Maneuver Center of Excellence, and Director of the Combined Joint Interagency Task Force-Shafafiyat at the International Security Assistance Force Headquarters in Kabul, Afghanistan. He is known for his roles in the Gulf War, Operation Enduring Freedom, and Operation Iraqi Freedom. McMaster authored the book Dereliction of Duty in 1997, which criticized the actions of high-ranking U.S. military leadership during the Vietnam War.