- Adena culture (800 BC)
- Hopewell culture (100 - 400 AD)
- Fort Ancient culture (1000 - 1750)
- Iroquoians, Algonquian and Siouan tribes (c. 1600)
- French explorers reach Ohio (17th century)
- Beaver Wars (1609 - 1701)
- Ohio Country becomes part of New France (1663)
- George Washington loses the Battle of Fort Necessity (1754)
- France cedes Ohio to Great Britain (1763)
- Pontiac's Rebellion (1763)
- Lord Dunmore's War (1774)
- American Revolution (1775 - 1783)
- Becomes part of Illinois Country, Virginia (1778 - 1782)
- Virginia, Massachusetts and Connecticut cede land claims to Ohio (1784 - 1789)
- Northwest Indian War (1786 - 1795)
- Northwest Territory established (1787)
- Battle of Fallen Timbers (1794)
- Ohio becomes the 17th state in the United States (1803)
- War of 1812
- Battle of Lake Erie (1813)
- Indian Removal Act (1830)
- Toledo War (1835 - 1836)
- American Civil War (1861 - 1865)
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