關島（The Territory of Guam；查莫羅文：Guåhan）是位於西太平洋的島嶼，美國的一個有組織非併入屬地.

 1941年，日本派出大規模海陸空部隊攻擊關島，島上500餘名駐守官兵向日軍投降，關島遂被日軍佔領。1944年，美軍派出優勢艦艇和空軍對關島的日軍作戰，以擊斃島上日軍18000餘人，自身陣亡1700人的戰爭結果而奪回關島控制權。現關島為美國在西太平洋上的重要軍事基地之一，被稱為「不沉的航空母艦（英語：Unsinkable aircraft carrier）」。2010年，美國斥資126億美元對關島軍事設施進行擴建，意將其建成西太平洋超級軍事基地，實施的項目有：建設核動力航母碼頭、飛彈防禦系統和實戰演習場；另外對島上的軍事設施加強掩體防護，特別是機庫、油庫、彈藥庫，以預防彈道飛彈攻擊。

 Guam (ⁱ/ˈɡwɑːm/ or /ˈɡwɒm/; Chamorro: Guåhån) is an organized, unincorporated territory of the United States in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government.^[4][5] Guam is listed as one of seventeen Non-Self-Governing Territories by the Special Committee on Decolonization of the United Nations.^[6] The island's capital is Hagåtña (formerly named Agana). Guam is the largest and southernmost of the Mariana Islands.

  Guam was captured by the Japanese on December 8, 1941, just hours after the attack on Pearl Harbor, and was occupied for two and a half years. During the occupation, the people of Guam were subjected to acts that included forced labor, torture, beheadings, and rape,^[] and were forced to adopt the Japanese culture^] Guam was subject to fierce fighting when U.S. troops recaptured the island on July 21, 1944, a date commemorated every year as Liberation Day.^[

 

 

 

 

 

 

 

 

安德森空軍基地（英語：Andersen Air Force Base）是位於美國關島北部的一個空軍基地，為美國太平洋空軍第36聯隊的屯駐地。安德森基地上同時有行動小組、維修小組、任務支援小組及醫療小組。

現時基地主要支援美軍在太平洋及印度洋地區的後勤工作。