The largest islands in the Aleutians are Attu (the farthest from the mainland), and Unalaska, Umnak, and Unimak in the Fox Islands.
Major islands: Unimak Island, Unalaska Island, …
Population: 8,162 (2000)
Total islands: >300
Location: North Pacific Ocean, Bering Sea
The Aleutian Islands also called the Aleut Islands or Aleutic Islands and known before 1867 as the Catherine Archipelago, are a chain of 14 large volcanic islands and 55 smaller islands.
Most of the Aleutian Islands belong to the U.S. state of Alaska, but some belong to the Russian federal subject of Kamchatka Krai. Wikipedia
Largest settlement: Unalaska (pop. 4,283)
Size: 6,821 square miles britannica.com
https://en.wikipedia.org/wiki/Aleutian_Islands
The islands, with their 57 volcanoes, form the northernmost part of the Pacific Ring of Fire. Physiographically, they are a distinct section of the larger Pacific Border province, which in turn is part of the larger Pacific Mountain System physiographic division.
Battles and skirmishes occurred on the islands during the Aleutian Islands Campaign of World War II. The Japanese landing and occupation of Kiska and Attu in June 1942 were the only two invasions of the United States during that war.