List of components of the U.S. Department of Defense
| Commander-in-Chief: | President of the United States, Donald Trump |
| Secretary of Defense: | Pete Hegseth |
| Chairman of the Joint Chiefs of Staff: | Charles Q. Brown Jr., USAF |
| Military budget: | $718 billion (2018) |
| Employees: | 700,000 civilian 2.8 million military (2008) |
The chain of command leads from the president (as commander-in-chief) through the secretary of defense down to the newest recruits. The United States Armed Forces are organized through the United States Department of Defense, which oversees a complex structure of joint command and control functions with many units reporting to various commanding officers. The following is an incomplete list of the various major military units, commands, and DOD offices and agencies, including civilian and military chains of command.