olemus
USA valitsusasutus (The Pentagon, Arlington, Virginia) aastast 1947, töötajaid ja sõjaväelasi 2,86 miljonit (2018)
= executive division of the U.S. federal government responsible for ensuring national security and supervising U.S. military forces

ülevaateid
https://en.wikipedia.org/wiki/United_States_Department_of_Defense
https://en.wikipedia.org/wiki/Organizational_structure_of_the_United_States_Department_of_Defense
https://www.defense.gov/Our-Story/

veebisait
https://www.defense.gov