United States Department of Defense
Executive department of the US federal government
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| March 2025 | Established the Joint Task Force-Southern Border from the 10th Mountain Division headquarters to oversee joint forces along the 2,000-mile Mexico-United States border, involving approximately 10,000 service members. |
| 2025 | John Phelan became the incumbent Secretary of the Navy during Donald Trump's presidency. |
| March 2025 | The Report on wealth and corrupt activities of the leadership of the Chinese Communist Party, mandated by Marco Rubio in section 6501 of the NDAA, was released after being initially postponed. |
| March 17 2025 | Austin Dahmer began serving as acting Deputy Under Secretary of Defense for Policy. |
| March 17 2025 | Tim Dill began performing the duties of Deputy Under Secretary of Defense for Personnel and Readiness. |
| March 17 2025 | Stephen Feinberg becomes the 36th Deputy Secretary of Defense, following Robert G. Salesses' acting tenure. |
| March 2 2025 | The US Treasury Department announced it would not enforce the federal beneficial ownership disclosure law. |
| February 7 2025 | DoDEA issued a statement announcing the removal of books potentially related to 'gender ideology or discriminatory equity ideology topics', including titles like The Kite Runner, An Indigenous Peoples' History of the United States, and Brave New World. |
| February 2025 | U.S. government issued new guidance to USCYBERCOM, formally pausing offensive cyber operations against Russia. |
| January 2025 | Activated military police and combat engineer units from the Army and Marine Corps to support Customs and Border Patrol on the U.S. southern border. |
| January 24 2025 | Robert Storch departs from the role of Inspector General, succeeded by Steven A. Stebbins in an acting capacity |
| January 23 2025 | The Supreme Court ruled that the Government can enforce the Corporate Transparency Act (CTA) while the Fifth Circuit Court reviews the law. |
| January 22 2025 | Robert E. Thompson appointed as acting Assistant Secretary of Defense (Energy, Installations, and Environment) under President Donald Trump. |
| January 20 2025 | Dr. Steve Ferrara becomes Acting Assistant Secretary of Defense (Health Affairs) under Secretary of Defense Pete Hegseth during Donald Trump's presidency. |
| January 20 2025 | Dustin Gard-Weiss begins serving as Acting Under Secretary of Defense for Intelligence under Pete Hegseth during the Trump administration. |
| January 20 2025 | President Donald Trump issued an executive order directing the Secretary of Defense to give Northern Command the mission to seal borders and maintain US sovereignty, requiring a revision of the Unified Command Plan within 10 days and a detailed implementation plan from NORTHCOM within 30 days. |
| January 20 2025 | Jules W. Hurst III begins performing the duties of Principal Deputy Under Secretary of Defense for Personnel and Readiness under acting USD(P&R) Darin Selnick, with Pete Hegseth, during President Donald Trump's administration. |
| January 20 2025 | Anne McAndrew began performing the duties of Deputy Under Secretary of Defense (Comptroller). |
| January 20 2025 | Patrick Witt began performing the duties of Deputy Under Secretary of Defense for Research and Engineering. |
| January 20 2025 | Brent G. Ingraham began performing the duties of Deputy Under Secretary of Defense for Acquisition and Sustainment. |
| January 20 2025 | Lloyd Austin completed his term as U.S. Secretary of Defense. |
| 2024 | Bilyana Anderson becomes the current President of Defense Acquisition University, succeeding James P. Woolsey. |
| 2024 | Aegis Ashore site at Redzikowo, Poland becomes operational |
| 2024 | Patriot PAC-3 successfully tested with the Aegis system. |
| December 2024 | DMSP 5D-2/F14 satellite exploded while in orbit after its decommissioning |
| December 26 2024 | The U.S. Court of Appeals for the Fifth Circuit affirmed the district court's injunction against the beneficial ownership disclosure provisions. |
| December 3 2024 | Judge Amos Mazzant in the U.S. District Court for the Eastern District of Texas issued a nationwide preliminary injunction against the beneficial ownership disclosure provisions, stating the act is likely unconstitutional. |
| February 2024 | DTRA Director Rebecca Hersman announced the agency would transition its intelligence resources and authorities to the Defense Intelligence Agency in her Strategic Intent 2022-2027 document. |
| February 29 2024 | Ronald Moultrie concludes his tenure, and Milancy Harris begins serving as Acting Under Secretary of Defense for Intelligence. |
| January 2024 | Iraq requests negotiations to end U.S. military presence in the country, amid rising regional tensions following the 2023 Israeli invasion of Gaza. |
| January 2024 | The annual rate of pay for Under Secretary of Defense for Intelligence and Security (USD(I&S)) at Executive Schedule Level III was set at $204,000. |
| January 2024 | Major General Lorna Mahlock, United States Marine Corps, began serving as CNMF commander. |
| January 22 2024 | YouGov Survey conducted a web-based interview polling 2,000 U.S. adult citizens between January 22-27, examining opinions on a specific policy (support 28%, oppose 50%, undecided 22%). |
| 2023 | The National Defense Authorization Act for Fiscal Year 2023 includes significant provisions for reporting and investigating Unidentified Flying Objects (UFOs), mandating military review of UFO sightings dating back to 1945 and providing whistleblower protections for reporting such phenomena. |
| 2023 | The National Defense Authorization Act requires the Secretary of Defense to rescind the COVID-19 vaccination directive for military personnel. |
| 2023 | The New York Times reported that DoDEA campuses achieved exceptional educational results, noted for being well-funded, racially integrated, and maintaining high performance levels during the COVID-19 pandemic. |
| June 27 2023 | The body-camera requirement for DoD police came into force, legally codified as 38 U.S.C. § 902(a)(3). |
| May 23 2023 | President Biden nominates Lt. Gen. Timothy Haugh to the Senate to be the next USCYBERCOM Commander. |
| March 1 2023 | Lester Martínez López becomes Assistant Secretary of Defense (Health Affairs) under Secretary of Defense Lloyd Austin during Joe Biden's presidency. |
| January 26 2023 | Brendan Owens becomes Assistant Secretary of Defense (Energy, Installations, and Environment) under Secretary of Defense Lloyd Austin during Joe Biden's presidency. |
| 2022 | Rebecca Hersman becomes Director of the Defense Threat Reduction Agency and continues in the role as of the current date. |
| 2022 | The Burma Unified through Rigorous Military Accountability Act of 2022 (BURMA Act of 2022) was introduced, aimed at addressing human rights violations in Myanmar by imposing sanctions on military leaders, the State Administrative Council (SAC), military-affiliated businesses, and providing support for pro-democracy groups. |
| 2022 | The Burmese military junta responded to the BURMA Act by issuing a statement claiming the legislation interferes with Myanmar's internal affairs and violates the country's sovereignty. |
| 2022 | The Government of the People's Republic of China increased diplomatic efforts to engage with ethnic armed organizations and the Myanmar junta to protect their business and geopolitical interests in response to the BURMA Act. |
| 2022 | Preliminary UFO-related language was introduced in the National Defense Authorization Act (NDAA) and the Intelligence Authorization Act, setting groundwork for more comprehensive UFO investigation and reporting mechanisms. |
| 2022 | The U.S. Senate proposed renaming the Air National Guard to the Air and Space National Guard to recognize the Space Force's establishment. |
| 2022 | The Air Force Association renamed itself the Air & Space Forces Association, internally implementing its proposed name change to reflect the Space Force. |
| December 29 2022 | The 117th Congress passed the Joseph Maxwell Cleland and Robert Joseph Dole Memorial Veterans Benefits and Health Care Improvement Act, requiring DoD police to use body-worn cameras while on duty. |
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This contents of the box above is based on material from the Wikipedia articles Aegis Ballistic Missile Defense System, United States Secretary of the Navy, National Defense Authorization Act for Fiscal Year 2021, Department of Defense Office of Inspector General, United States Cyber Command, Department of Defense Education Activity, Under Secretary of Defense for Personnel and Readiness, United States Deputy Secretary of Defense, Defense Threat Reduction Agency, United States Deputy Under Secretary of Defense, Department of Defense police, Defense Meteorological Satellite Program, United States Northern Command, Defense Acquisition University, Department of Defense Instruction 1300.28, United States Central Command, United States Department of the Air Force, National Defense Authorization Act for Fiscal Year 2023, United States Army Forces Command, Assistant Secretary of Defense for Energy, Installations, and Environment, Assistant Secretary of Defense for Health Affairs, List of the United States military installations in Iraq & Under Secretary of Defense for Intelligence and Security, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.