United States

Spanish Florida established as the first European colony in continental United States.

The settlement of Virginia marks the beginning of British colonization in America.

The United States declares independence from Britain, asserting universal rights.

The Revolutionary War ends, leading to international recognition of U.S. sovereignty.

Southern states attempt secession, leading to conflict with the Union.

The Civil War concludes with the national abolition of slavery.

The U.S. joins the Allies, marking its emergence as a great power.

Japan's attack propels the U.S. into World War II.

The collapse of the Soviet Union leaves the U.S. as the world's sole superpower.