Territorial evolution of the United States 1976, the transferred land was minuscule (ranging in size from 1 acre to 646 acres) and uninhabited. Territorial evolution of the United States The United States of America was created on July 4, 1776, with the declaration of independence of thirteen British colonies. Their independence was recognized by Great Britain with the Treaty of Paris of 1783, following the American Revolutionary War. This effectively doubled the size of the colonies, now able to stretch west past the Proclamation Line to the Mississippi River. This land was organized into territories and then states, though there remained some conflict with the sea-to-sea
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