美國海軍是一個美軍軍種，負責管理所有與海軍有關的事務。其職責為：「配備、訓練和武裝一支有能力贏得戰爭、阻止入侵和保證海域自由的海軍戰鬥部隊。」

The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the eight uniformed services of the United States.

是美國軍隊中的海軍陸戰隊及兩棲作戰部隊，其主要職責是運用美國海軍的艦隊（含航空兵），快速抵達全球各危機發生地執行戰鬥任務。美國海軍陸戰隊屬於美國軍隊中的一個獨立軍種，與美國海軍地位平行，同屬美國國防部下屬的美國海軍部

It is the Marine Corps and Amphibious Combat Forces in the US Army. Its main responsibility is to use the US Navy's fleet (including aviation) to quickly reach the global crisis sites to perform combat missions. The U.S. Marine Corps is an independent service of the U.S. Army, parallel to the U.S. Navy status, and is also part of the U.S. Department of Defense

美國海軍三棲特戰隊（英語：United States Navy SEa, Air and Land Teams，SEAL），一般稱作海豹部隊，是直屬美國海軍的一支特種部隊，亦是世界知名的特種三棲部隊，主要任務包括：非常規戰爭、國內外防禦、直接行動、反恐行動、特殊偵查任務五項。

The United States Navy Sea, Air, and Land (SEAL) Teams, commonly known as Navy SEALs, are the U.S. Navy's primary special operations force and a component of the Naval Special Warfare Command.

The United States Air Force (USAF) is the aerial warfare service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services.