Step-by-step explanation:
The Indiana Territory was created by a congressional act that President John Adams signed into law on May 7, 1800, to form an organized incorporated territory of the United States that existed from July 4, 1800, to December 11, 1816, when the remaining southeastern portion of the territory was admitted to the Union as the state of Indiana.[2] The territory originally contained approximately 259,824 square miles (672,940 km2) of land, but its size was decreased when it was subdivided to create the Michigan Territory (1805) and the Illinois Territory (1809). The Indiana Territory was the first new territory created from lands of the Northwest Territory, which had been organized under the terms of the Northwest Ordinance of 1787. The territorial capital was the settlement around the old French fort of Vincennes on the Wabash River, until transferred to Corydon near the Ohio River in 1813.