British America comprised the colonial territories of the British Empire in America from 1607 to 1783. These colonies were formally known as British America and the British West Indies before the Thirteen Colonies declared their independence in the American Revolutionary War (1775–1783) and formed the United States of America. After the American Revolution, the term British North America referred to the remainder of Great Britain's Canadian possessions. That term was first used informally in 1783, but it was uncommon before the Report on the Affairs of British North America (1839), generally known as the Durham Report. In the Caribbean, the British West Indies and other European sugar colonies were at the center for the Atlantic Slave Trade.