Attu is an island in the Near Islands. It is the westernmost point of the U.S. state of Alaska. The island became uninhabited in 2010, making it the largest uninhabited island in the United States.
The Battle of Attu Island was the site of the only World War II land battle fought in the United States and its Territories. The battlefield area is a U.S. National Historic Landmark.
Attu Station, a former Coast Guard LORAN station, is located at 52°51′N 173°11′E, making it one of the westernmost points of the United States relative to the rest of the country. However, since it is in the Eastern Hemisphere, being on the opposite side of the 180° longitude line of the contiguous 48 states, it can also be considered one of the easternmost points of the country. For purposes of calendar date, the International Date Line, however, passes to the west of Attu Island, making it the westernmost place in the United States with the same date.
In the chain of the Aleuts, the next island to the west of Attu are the Russian Commander Islands, 208 miles away.