United States Armed Forces 美军
（重定向自Armed Forces of the United States）
![United States Joint Service Color Guard on parade at Fort Myer](/Images/godic/202412/21/Jointcolors1657.jpg")
![U.S. military spending from 1910 to 2007, adjusted for inflation to 2003 dollars. The large spike represents World War II spending.](/Images/godic/202412/21/US_defense_spending_1910_to_20071657.png")
![American defense spending by GDP percentage 1910 to 2007.](/Images/godic/202412/21/US_defense_spending_by_GDP_percentage_1910_to_20071657.png")
![Active duty U.S. military personnel from 1950 to 2003. The two peaks correspond to the Korean War and the Vietnam War.](/Images/godic/202412/21/Active_duty_end_strength_graph1657.png")
The United States Armed Forces are the federal armed forces of the United States. They consist of the Army, Marine Corps, Navy, Air Force, and Coast Guard. The President of the United States is the military's overall head, and helps form military policy with the U.S. Department of Defense (DoD), a federal executive department, acting as the principal organ by which military policy is carried out.