United States

=== Military ===
{{Main|United States Armed Forces|Military history of the United States}}
[[File:Aerial view of the Pentagon, Arlington, VA (38285035892).jpg|thumb|[[The Pentagon]], the headquarters of the [[United States Department of Defense|U.S. Department of Defense]] in [[Arlington County, Virginia]], is one of the world's largest office buildings with about {{convert|6.5|e6ft2|m2}} of [[floor space]].]]
The President is the [[Commander-in-Chief of the United States|commander-in-chief]] of the United States Armed Forces and appoints its leaders, the [[United States Secretary of Defense|secretary of defense]] and the [[Joint Chiefs of Staff]]. The [[United States Department of Defense|Department of Defense]], which is headquartered at [[the Pentagon]] near Washington, D.C., administers five of the six service branches, which are made up of the [[United States Army|Army]], [[United States Marine Corps|Marine Corps]], [[United States Navy|Navy]], [[United States Air Force|Air Force]], and [[United States Space Force|Space Force]]. The [[United States Coast Guard|Coast Guard]] is administered by the [[United States Department of Homeland Security|Department of Homeland Security]] in peacetime and can be transferred to the [[United States Department of the Navy|Department of the Navy]] in wartime.<ref>{{cite web|url=https://www.cfr.org/blog/happy-231st-birthday-united-states-coast-guard|title=Happy 231st Birthday to the United States Coast Guard!|last=Lindsay|first=James M.|publisher=[[Council on Foreign Relations]]|location=New York City|date=August 4, 2021|access-date=July 16, 2022|quote=During peacetime it is part of the Department of Homeland Security. During wartime, or when the president or Congress so direct, it becomes part of the Department of Defense and is included in the Department of the Navy.}}</ref>

The United States [[Military budget of the United States|spent $877 billion on its military]] in 2022, which is by far the [[List of countries with highest military expenditures|largest amount]] of any country, making up 39% of global military spending and accounting for 3.5% of the country's GDP.'''''<ref name="SIPRI-20202">{{cite web |date=April 2023 |title=Trends in World Military Expenditure, 2022 |url=https://www.sipri.org/sites/default/files/2023-04/2304_fs_milex_2022.pdf |access-date=April 29, 2023 |publisher=[[Stockholm International Peace Research Institute]]}}</ref>'''''<ref>{{cite web| url=https://sipri.org/sites/default/files/Data%20for%20all%20countries%20from%201988%E2%80%932020%20in%20constant%20%282019%29%20USD%20%28pdf%29.pdf| title=Data for all countries from 1988–2020 in constant (2019) USD (pdf)| publisher=SIPRI| access-date=April 28, 2021| archive-date=April 28, 2021| archive-url=https://web.archive.org/web/20210428180002/https://sipri.org/sites/default/files/Data%20for%20all%20countries%20from%201988%E2%80%932020%20in%20constant%20(2019)%20USD%20(pdf).pdf| url-status=live}}</ref> The U.S. has [[Nuclear weapons of the United States|45% of the world's nuclear weapons]], the second-largest amount after Russia.<ref>{{cite web|last=Reichmann|first=Kelsey|date=June 16, 2019|title=Here's how many nuclear warheads exist, and which countries own them|url=https://www.defensenews.com/global/2019/06/16/heres-how-many-nuclear-warheads-exist-and-which-countries-own-them/|url-status=live|archive-url=https://conifer.rhizome.org/mossypiglet/wikipedia-citations/20200923183006/https://www.defensenews.com/global/2019/06/16/heres-how-many-nuclear-warheads-exist-and-which-countries-own-them/|archive-date=September 23, 2020|access-date=September 23, 2020|website=defensenews.com|publisher=Sightline Media Group}}</ref>

The United States has the third-largest combined armed forces in the world, behind the [[People's Liberation Army|Chinese People's Liberation Army]] and [[Indian Armed Forces]].<ref>{{cite book |last1=Hackett |first1=James |title=The military balance. 2023 |date=2023 |publisher=Routledge |location=London |isbn=978-1032508955}}</ref> The military operates about 800 bases and facilities abroad,<ref>{{cite web|url=https://www.vox.com/2015/5/18/8600659/military-bases-united-states|title=Why does the US have 800 military bases around the world?|last=Harris|first=Johnny|date=May 18, 2015|website=Vox|access-date=September 23, 2020|url-status=dead|archive-date=September 24, 2020|archive-url=https://web.archive.org/web/20200924114313/https://www.vox.com/2015/5/18/8600659/military-bases-united-states}}</ref> and maintains [[United States military deployments|deployments greater than 100 active duty personnel]] in 25 foreign countries.<ref>{{cite web|url=https://siadapp.dmdc.osd.mil/personnel/MILITARY/history/hst1003.pdf|archive-url=https://web.archive.org/web/20130724211511/https://siadapp.dmdc.osd.mil/personnel/MILITARY/history/hst1003.pdf|title=Active Duty Military Personnel Strengths by Regional Area and by Country (309A)|publisher=Department of Defense|date=March 31, 2010|access-date=October 7, 2010|archive-date=July 24, 2013}}</ref>