The United States of America is a federal republic compromised of 51 states and a federal district. Establishes in the 1700's from British puritans escaping religious prosecution. The colonies fell under the control of the British government. After unfair taxes and demanding public wanting to make the country into a republic fueled the American Revolution. In 1776 after years of fighting the newly formed United States of America was created after Great Britain ceded the original 13 colonies to the newly formed republic. After numerous purchases and territory being won via conquest (e.g. the purchase of Alaska from the Russians in 1912 and the war for Texas in 1837) In 1861 the pro slavery southern states tried to rebel against the government starting the American Civil War. After four years of fighting the US government won the war and slavery was abolished.
With the 20th Century in full swing, the United States was just a minor power until World War II, with the Attack on Pearl Harbor, the citizens of the US wanted vengeance against the Japanese Empire. With the industrial might of the United States now fully into the war effort, new technologies were used in a new age of warfare. The American war machine swept through Japanese occupied territory and took back most of the islands and naval bases. By the end of the war the US and Soviet Union had emerged out of the war as superpowers, taking the place of the former British Empire. As the level of technology increased the USA and USSR engaged in a deadly Arms Race as countries in Europe and SE Asia fell under the Communist banner.
Space Race and the Cold War
In 1957 the Soviet Union launched the first artificial satellite, Sputnik 1. The American public was shocked to see that their communist foes had beaten them, but President Kennedy had other ideas. In a speech to a joint session at Congress, Kennedy challenged the Soviets to a moon landing by the end of the decade. The Soviets answered the challenge with Yuri Gagarin, the first man in space in 1961. The Americans catch up with the first 'space walk' in 1963 by Micheal Collins. The Soviet Union starts peace talks with the US and disarms some of their nuclear weapons. In 1964 Puerto Rico was added as the 51st state after a public referendum. Despite being outmatched by the Soviet program being years ahead of the Americans, the US space program managed to achieve a few firsts, the Soviet Union landed the first man on the moon in 1967, the United States launched the first American to the moon in 1968, the USSR and USA reduced their nuclear stockpiles with numerous treaties and reunified Germany in 1972.