JMA--History is history. History repeats itself. The dawn of the 20th century. A new superpower has been born. It was time for the United States to prove itself as the world's dominant superpower, and it was after when both France and Great Britain colonized much of the present continental United States (e.g. Louisianna - FRA; New York, New Jersey, New Hampshire, Virginia, North Carolina, Richmond, Delaware - GBR, respectively,). The Americans inherited all the English-French battle tactics...Also after the Spanish-American War, the colonies of Spain was sold to the highest bidder: United States. For this reason, all Spanish colonies were bought by the USA: Cuba, Mexico, Philippines, and Chile. The US also bought Guam, and all other islands in the Pacific Rim. The American troops occupied most of all the territories in both Cuba and the Philippines. The latter particularly became a US territory. And then, it came the time when Japanese forces attacked the Pearl Harbor in Hawaii, the American bases in the Philippines in Bataan. Thousands of Americans died in the Fall of Bataan in the Philippines. They were forced in the "Death March". A million of Americans died in the Philippines during the "Death March". The Americans were forced to eat human wastes, drink unclean water, sleep in the jungle full of deadly insects, and suffered defeat at the Fall of Bataan in the Philippines. Under the command of General Douglas MacArthur, the United States was forced built their atomic bomb, and it was called the MANHATTAN PROJECT. In retaliation, the USA dropped them later in the cities of Nagasaki and Hiroshima, Japan--the new superpower rising in the Pacific Region. Finally, the Japanese surrendered on September 02, 1945.
As you can see, this was the real reason why the World War II finally ended by the hands of the American troops. And then came along the separation of East(USSR) and West(USA), creation of Berlin Wall(Germany), and the beginning of Cold War...Then, the Russian territory of Alaska was bought by the United States and joined as the 49th largest state in the U.S.A. on January 1959.