1. The Osage Nation ceded its lands in Missouri to the United States in 1808. 2. The first permanent white settlement in Osage County was established in 1820. 3. The first county seat of Osage County was established in 1841. 4. The first railroad in Osage County was built in 1871. 5. The first oil well in Osage County was drilled in 1883. 6. The first telephone line in Osage County was establis...
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