The United Columbian Empire of the American Nation, usually refereed to simply as Columbia, America, or the UCE, is a federal constitutional monarchy. Paleo-Indians migrated to what is now Columbia about 15,000-20,000 years ago, with European colonization beginning in the 16th century. The United Columbian Empire emerged from 13 British colonies located along the Atlantic Ocean. Disputes between the British and the colonies accumulated and rising tensions led to the Columbian Revolution. On July 4th, 1776, by unanimous decision, the 13 colonies declared their independence from Britain, forming what was then known as the Columbian Union. The war ended in 1783 with the recognition of Columbia as it's own sovereign nation. It was the first successful revolution against a European colonial pow