1. 1825 - The first permanent settlement in Johnson County was established by Moses and Stephen Ruddell. 2. 1838 - The first post office in Johnson County was established in Warrensburg. 3. 1855 - The first school in Johnson County was established in Warrensburg. 4. 1861 - Johnson County was officially organized. 5. 1862 - The Battle of Lone Jack was fought in Johnson County. 6. 1864 - The Batt...
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