Dashed left edge = started before March 1803 ·
Dashed right edge = ongoing beyond March 1803
Events in March 1803 1
1803Ohio admitted as a US stateOhio becomes the 17th state of the UnionOhio was admitted to the United States as the 17th state, the first to be carved from the Northwest Territory. Its admission reflected rapid American settlement west of the Appalachians. Chillicothe served as the new state's first capital.