United States from Siberia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century. The United States emerged from the thirteen British colonies established along the East Coast. Numerous disputes between Great Britain and the colonies following the French and Indian War led to the American Revolution, which began in 1775, and the subsequent Declaration of Independence in 1776. The war ended in 1783 with the United States becoming the first country to gain independence from a European power. The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill
Italian declaration of war on the United States Italian declaration of war on the United States On December 11, 1941, Italy declared war on the United States in response to that country's declaration of war upon the Empire of Japan following the attack on Pearl Harbor four days earlier. Germany also declared war on the U.S. the same day. The US immediately responded by declaring war on Germany and Italy, thus thrusting the United States in fighting two major fronts across the Pacific and Atlantic Oceans in World War II. On December 7, 1941, 353 aircraft of the Empire of Japan attacked the U.S. naval base at Pearl