The Department of the Air Force (DAF) is one of the three Military Departments within the Department of Defense of the United States of America. The Department of the Air Force was formed on September 18, 1947, per the National Security Act of 1947 and it includes all elements and units of the United States Air Force (USAF).
The Department of the Air Force is headed by the Secretary of the Air Force (SAF/OS), a civilian, who has the authority to conduct all of its affairs, subject to the authority, direction and control of the Secretary of Defense. The Secretary of the Air Force's principal deputy is the Under Secretary of the Air Force (SAF/US). Their senior staff assistants in the Office of the Secretary of the Air Force are four Assistant Secretaries for Acquisition, Financial Management & Comptroller, Installations, Environment & Logistics, Manpower & Reserve Affairs and a General Counsel. The highest-ranking military officer in the department is the Chief of Staff of the Air Force who is the senior uniformed adviser to the Secretary, represents the Air Force on the Joint Chiefs of Staff, heads the Air Staff and is assisted in the latter capacity by the Vice Chief of Staff of the Air Force.
By direction of the Secretary of Defense, the Secretary of the Air Force assigns Air Force units – apart from those units performing duties enumerated in 10 U.S.C. § 8013 unless otherwise directed – to the Commanders of the Combatant Commands. Only the Secretary of Defense (and the President) has the authority to approve transfer of forces between Combatant Commands.
|Department of the Air Force|
Seal of the U.S. Department of the Air Force
|Formed||September 18, 1947|
|Jurisdiction||United States Air Force|
|Headquarters||The Pentagon, Arlington County, Virginia, U.S.|
|Employees||330,159 Regular Air Force|
68,872 Air Force Reserve
94,753 Air National Guard
|Parent agency||U.S. Department of Defense|
|Air Force Base + OCO + Emergency||FY 2018||FY 2019 Request||Delta
FY19 - FY18
|Operation and Maintenance||58,191,005||61,407,391||+3,216,386|
|Revolving and Management Funds||63,533||77,644||+14,111|
*$ in Millions
Numbers May Not Add Due to Rounding
On March 1st, 2019, the Department of Defense sent a proposal to Congress that would establish the United States Space Force as an independent military service within the Department of the Air Force. In addition, the proposal would create an Undersecretary of the Air Force for the Space Force to provide civilian oversight, as well as providing the Space Force with a distinct budget. 
|Operations and history|