Question: Pearlridge overlooks an historic lagoon, the attack on which, caused the United States to enter into which war?
Context: Pearl Harbor is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu.  Much of the harbor and surrounding lands is a United States Navy deep-water naval base.  It is also the headquarters of the United States Pacific Fleet.  The U.S. government first obtained exclusive use of the inlet and the right to maintain a repair and coaling station for ships here in 1887.  The attack on Pearl Harbor by the Empire of Japan on December 7, 1941, was the immediate cause of the United States' entry into World War II. The St. Alban's Bay Culvert is a historic bridge in Garrison Township, Minnesota, United States.  It carries the four-lane U.S. Route 169 (US 169) over the head of a stream flowing out of Mille Lacs Lake.  It was built from 1938 to 1939 as part of a major New Deal project to create a scenic parkway along the lakeshore.  The bridge was listed on the National Register of Historic Places in 2015 as the St. Alban's Bay Culvert at Mille Lacs Lake for having state-level significance in the themes of architecture and politics/government.  It was nominated for being a well-preserved example of the Minnesota Highway Department's earliest scenic improvements, its rare status as a highway bridge built by the department's Roadside Development Division—a unit usually focused on overlooks and waysides—and for its fine National Park Service rustic design. Pearlridge (formerly Pearlridge Center) is the second largest shopping center in Hawaiʻ i, after Ala Moana, and is Hawaiʻ i's largest enclosed shopping center, located in ʻ Aiea.  Opened in 1972 and expanded in 1976, the enclosed mall is split up into three "phases" (Uptown, Downtown, & Phase Three) and overlooks historic Pearl Harbor and the USS Arizona Memorial.  The property includes the only monorail in Hawaiʻ i, the only emergency clinic located on mall property (Pali Momi Medical Center), and an eight story office complex (Pearlridge Office Center). Our Mother of Sorrows Grotto Historic District is a nationally recognized historic district located on the Mount Mercy University campus in Cedar Rapids, Iowa, United States.  It was listed on the National Register of Historic Places in 2015.  The grotto consists of a lagoon and five structures that are dedicated to the Virgin Mary.  They include two arched entryways, a bridge, a 10-column structure representing the Ten Commandments, and a canopy that encloses a marble statue of the Virgin Mary.  The grotto was built by William H. Lightner, a self-trained architect, between 1929 and 1941.  He utilized 12 tons of stone and 300 varieties of Italian mosaic glass that he acquired in his travels of more than 40000 mi .  Popular in southern Europe, grottoes are natural or artificial caves that are places of spiritual reflection.  In the United States, they are found primarily in the Midwest, and are mainly created by self-trained artists and builders. Desolation Peak is in the North Cascade Mountains of Washington state, about 6.2 mi south of the Canada–United States border and in the Ross Lake National Recreation Area.  It was first climbed in 1926 by Lage Wernstedt, who named it for the destruction caused by a forest fire that swept the slopes bare that same year.  At the summit stands a small, wooden, one room fire lookout belonging to the National Park Service.  The lookout is 15 mi from the nearest road and overlooks miles of forest and numerous other peaks. The USS "Panay" incident was a Japanese attack on the American gunboat "Panay" while it was anchored in the Yangtze River outside Nanking (now spelled Nanjing), China on 12 December 1937.  Japan and the United States were not at war at the time.  The Japanese claimed that they did not see the American flags painted on the deck of the gunboat, apologized, and paid an indemnity.  Nevertheless, the attack and the subsequent Allison incident in Nanking caused U.S. opinion to turn against the Japanese. The T1 tanker or T1 are a class of sea worthy small tanker ships used to transport fuel oil before and during World War II, Korean War and Vietnam War.  The T1 tanker classification is still in use today.  T1 tankers are about 200 to 250 feet in length and are able to sustain a top speed of about 12 knots.  The hull designation "AO" is used by the US Navy to denote the ship is a T1 oil tanker and "AOG" that the T1 is a gasoline tanker.  The small size allows the T1 to enter just about any sea port or to anchor around a small island, this was very useful during the Pacific War.  The T1 tanker can carry about 48,000 to 280,000 BBLs.  Some T1 tankers were used to transport goods other than oil, a few were used for black oil-crude oil, diesel, chemicals and rarely bulk cargo like grain.  T1 tankers are also called liquid cargo carriers.  The T1 tanker has about a 6,000 to 35,000 DWT of cargo.  The small size also gives the ships short turn around time for repair, cleaning, loading and unloading.  A T1 tanker carrying dirty cargo, like crude oil needs a few weeks of labor to clean before carrying clean cargo.  Most T1 ships during World War II were named after major oil fields. T1 tanker are operated by the US Navy, War Shipping Administration and United States Maritime Commission.  Some T1 were loaned to England in the Lend-Lease program for World War II, after the war most were returned to the USA.  After World War II many of the T1 ships were sold to for civilian use.  Each T1 had emergency life rafts on the boat deck.  The ships had cargo booms and piping to load and unload fuel.  During war time the T1 are armed for protection with deck guns.  A typical ship may have one single 3"/50 dual purpose gun, two 40 mm guns and three single Oerlikon 20 mm cannon.  A T1 at war time normally had a crew of 38 and up to 130.  If operating as a United States Merchant Marine ship, the crew would be a mix of civilian Merchant Marines and United States Navy Armed Guards to man the guns. Japan–United States relations (日米関係 ) began in the late 18th and early 19th century, with the diplomatic but force-backed missions of U.S. ship captains James Glynn and Matthew C. Perry to the Tokugawa shogunate being of particular importance.  The countries maintained relatively cordial relations after that, and Japanese immigration to the United States was prominent until the 20th century, up until the 1930s, when Japanese actions during the Second Sino-Japanese War caused the United States to impose harsh sanctions against Japan, ultimately leading to the Japanese surprise attack against the US naval base at Pearl Harbor, opening the Pacific War theater of World War II.  The United States and its Allies ultimately defeated Japan, and war ended with the American atomic bombings of the Japanese cities of Hiroshima and Nagasaki.  Japan surrendered, and was subjected to seven years of military occupation by the United States, during which the American occupiers helped rebuild the country, shared American technology, and carried out widespread political and economic reforms so as to transform Japan into a democracy and a potential bulwark against Communism.  Following the end of the occupation, the countries' relationship prospered again.  A new military alliance treaty, an exchange of technology and culture produced a strong alliance.  The countries' trade relationship has particularly prospered since then, with Japanese automobiles and consumer electronics being especially popular. The Indo-Pakistani War of 1965 was a culmination of skirmishes that took place between April 1965 and September 1965 between Pakistan and India.  The conflict began following Pakistan's Operation Gibraltar, which was designed to infiltrate forces into Jammu and Kashmir to precipitate an insurgency against Indian rule.  India retaliated by launching a full-scale military attack on West Pakistan.  The seventeen-day war caused thousands of casualties on both sides and witnessed the largest engagement of armored vehicles and the largest tank battle since World War II.  Hostilities between the two countries ended after a United Nations mandated ceasefire was declared following diplomatic intervention by the Soviet Union and the United States, and the subsequent issuance of the Tashkent Declaration.  Much of the war was fought by the countries' land forces in Kashmir and along the border between India and Pakistan.  This war saw the largest amassing of troops in Kashmir since the Partition of British India in 1947, a number that was overshadowed only during the 2001–2002 military standoff between India and Pakistan.  Most of the battles were fought by opposing infantry and armoured units, with substantial backing from air forces, and naval operations.  The war exposed Pakistan's inadequate standards of military training, its misguided selection of officers, poor command and control arrangements, poor intelligence gathering and bad intelligence procedures.  In spite of these shortcomings, the Pakistan Army managed to fight the larger Indian Army.  Many details of this war, like those of other Indo-Pakistani Wars, remain unclear. The Putnam House is a historic building in the Harmar neighborhood of Marietta, Washington County, Ohio, United States, on the National Register of Historic Places.  The house overlooks the Muskingum River.
Answer: World War II