White squatters continue to be a frequent…
1855 CE
The Kansas–Nebraska Act results in numerous settlers arriving in Kansas from 1854; both abolitionists and pro-slavery groups are represented among those trying to establish residency in order to vote on whether the territory will have slavery.
The Osage lands have become overrun with European-American settlers.
In 1855, the Osage suffer another epidemic of smallpox, because a generation had grown up without getting vaccinated.