The United States first came into the The True Korea timeline during the Korean War, helping the south reunite the Korean peninsula under the south's government ideals. The United States and Korea (The True Korea are successful at doing this. Eventually, the Chinese invade Korea, starting the Sino-Korean War. With aid from the Americans and Japan, the Koreans defeat the communist forces. In 1966, the People's Republic of China and the Soviet Union fuse, creating the Sino-Soviet Republics, a communist superpower and ultimate rival to the United States. Eventually the nation goes to civil war. The United States helps aids the democrats, ultimately leading to the downfall of the Sino-Soviet Republics. The United States eventually ends up becoming allied with some of the post-Soviet-Sino states, including Karelia, Crimea, and Taiwan.
The United States is one of the world's greatest economic superpowers. Thanks to the fall of the Sino-Soviet Republics (and it splitting into numerous countries), the United States has the second largest population of any country in the world, only beaten by India, as well as being one of the largest countries too. The United States is an economic giant in many industries, and overall an extremely prosperous nation.