The area of Georgia was part of the original territory of the United States. It was chartered as a colony in 1732. Georgia ratified the U.S. Constitution on January 2, 1788; it was the fourth of the original 13 states to join the Union. At that time, Georgia included territory that extended westward to the Mississippi River and now makes up most of Alabama and Mississippi. The territory west of the present state boundary was added to Mississippi Territory when Georgia ceded to the United States its claims to the territory in 1802. As part of this cession, Georgia obtained part of the South Carolina cession of 1787 from the federal government along its northern boundary. These changes left Georgia with generally the same boundary as the present state.