Question: Which island where the Japanese Navy attacked and occupied United States territory during World War II became uninhabited in 2010?

Context paragraphs:
Orote Field: Orote Field is a former air base in the United States territory of Guam built by the United States Marine Corps and the United States Navy (1921-1931).  It was captured by the Imperial Japanese Navy at the start of World War II and remained under Japanese control until the end of July 1944, when it was taken back by the USMC.  The airfield itself, built on the Orote Peninsula, was one of many on Guam, and was closed for good in 1946, but still sees some use as a touch-and-go training strip used by C-130 Hercules crews located nearby on Andersen Air Force Base.

Japanese Occupation Site, Kiska Island: The Japanese Occupation Site on Kiska island (along with Attu Island) in the Rat Islands group of the Aleutian Islands of Alaska is where the Japanese Navy attacked and occupied United States territory during World War II.  The Japanese built defenses and other infrastructure on the island before abandoning it in 1943 after losing the Battle of Attu.  American and Canadian forces reoccupied the abandoned island, and departed the island in 1946.  Now a part of the Alaska Maritime National Wildlife Refuge, the central portion of the island, where these military activities were concentrated, was designated a National Historic Landmark in 1985.

Battle of the Philippine Sea: The Battle of the Philippine Sea (June 19–20, 1944) was a major naval battle of World War II that eliminated the Imperial Japanese Navy's ability to conduct large-scale carrier actions.  It took place during the United States' amphibious invasion of the Mariana Islands during the Pacific War.  The battle was the last of five major "carrier-versus-carrier" engagements between American and Japanese naval forces, and pitted elements of the United States Navy's Fifth Fleet against ships and aircraft of the Imperial Japanese Navy's Mobile Fleet and nearby island garrisons.  This was the largest carrier-to-carrier battle in history.

Gato-class submarine: The "Gato"-class were a class of submarines built for the United States Navy and launched in 1941–1943; they were the first mass-production U.S. submarine class of World War II.  Together with their near-sisters the "Balao" and "Tench" class es, their design formed the majority of the United States Navy's World War II submarine fleet.  Named after the lead ship of the class, USS "Gato" , the "Gato"s and their successors formed the core of the submarine service that was largely responsible for the destruction of the Japanese merchant marine and a large portion of the Imperial Japanese Navy in World War II.  "Gato"' s name comes from a species of small catshark.  Like most other U.S. Navy submarines of the period, boats of the "Gato" class were given the names of marine creatures.  In some references, the "Gato"s are combined with their successors, especially the "Balao" class.

Dungcas Beach Defense Guns: The Dungcas Beach Defense Guns are an old World War II Japanese fortification in the United States territory of Guam.  It consists of a tunnel dug in the coral limestone of the cliffs overlooking the beach on the northeast east side of Hagåtña Bay on the west side of the island.  The tunnel has two guns mounted at openings facing the beach.  This fortification was built by the 48th Independent Mixed Brigade of the 29th Division of the Imperial Japanese Army, during its occupation of the island 1941-44.  The guns from this position were probably fired on landing Allied forces during the 1944 Battle of Guam, in which the United States retook the island.

Attu Island: Attu (Aleut: "Atan" ) is the westernmost and largest island in the Near Islands group of the Aleutian Islands of Alaska, and the westernmost point of land relative to Alaska, the United States, North America and the Americas.  The island became uninhabited in 2010.

Carrier battle group: A carrier battle group (CVBG) consists of an aircraft carrier (designated CV) and its large number of escorts, together defining the group.  The first naval task forces built around carriers appeared just prior to and during World War II.  The Imperial Japanese Navy, IJN, was the first to assemble a large number of carriers into a single task force, known as Kido Butai.  This task force was used with devastating effect in the Imperial Japanese Navy's Attack on Pearl Harbor.  Kido Butai operated as the IJN's main carrier battle group until four of its carriers were sunk at the Battle of Midway.  In contrast, the United States Navy deployed its large carriers in separate formations, with each carrier assigned its own cruiser and destroyer escorts.  These single-carrier formations would often be paired or grouped together for certain assignments, most notably the Battle of the Coral Sea and Midway.  By 1943, however, large numbers of fleet and light carriers became available, which required larger formations of three or four carriers.  These groups eventually formed the Fast Carrier Task Force, which became the primary battle unit of the U.S. Fifth and Third Fleets.

23rd Infantry Division (United States): The 23rd Infantry Division, more commonly known as the Americal Division, of the United States Army was activated 27 May 1942 on the island of New Caledonia.  In the immediate emergency following Pearl Harbor, the United States had hurriedly sent three individual regiments to defend New Caledonia against a feared Japanese attack.  This division was the only division formed outside of United States territory during World War II (a distinction it would repeat when reformed during the Vietnam War).  At the suggestion of a subordinate, the division's commander, Major General Alexander Patch, requested that the new unit be known as the "Americal Division"—the name being a contraction of "American, New Caledonian Division".  This was unusual, as most U.S. divisions are known by a number.  After World War II the Americal Division was officially re-designated as the 23rd Infantry Division.  However, it was rarely referred to as such, even on official orders.

Eikichi Kato: Captain Eikichi Kato was a senior officer in the Imperial Japanese Navy during World War II.  Kato was the senior officer of the Imperial Japanese Navy forces on the Bonis Peninsula and Buka Island during the latter stages of World War II.

Japanese marine paratroopers of World War II: The Imperial Japanese Navy fielded naval paratroopers during World War II.  The troops were officially part of the Special Naval Landing Forces (SNLF or "Rikusentai").  They came from the 1st, 2nd and 3rd Yokosuka SNLFs.  The 2nd Yokosuka took no part in any airborne operations and became an island defensive base unit.  They were under the operational control of the Imperial Japanese Navy Air Service (IJNAS or "Dai-Nippon Teikoku Kaigun Koku Hombu").  "Rikusentai" paratroopers should not be confused with the Imperial Japanese Army paratroopers, known as "Teishin".

Supporting paragraphs: Japanese Occupation Site, Kiska Island Attu Island
Answer: Attu Island