Whitman Mission: The Killing That Opened the Oregon Trail to Military Force

Marcus Whitman arrived in the Walla Walla Valley in eighteen thirty-six with his wife Narcissa and a mandate from the American Board of Commissioners for Foreign Missions to establish a Protestant station among the Cayuse people. He built it at a place the Cayuse called Waiilatpu, which means 'place of the people of the rye grass.' The Cayuse were not interested in conversion. They tolerated the mission at first as a source of trade goods and medical care.

By the mid-eighteen forties, the mission had become something else: a staging post on the Oregon Trail, where thousands of wagon-party migrants stopped for rest, resupply, and medical treatment. Marcus Whitman guided a thousand-person wagon train himself in eighteen forty-three, actively promoting overland settlement to a region the Cayuse considered theirs. The mission's traffic multiplied. Cayuse land absorbed the pressure.

In eighteen forty-seven, a measles epidemic arrived with the migrant wagons. Among the settlers who passed through, many survived it. Among the Cayuse, whose bodies had never encountered the pathogen, it killed roughly half the population of some bands. The Cayuse held healers accountable for patient deaths under their own legal traditions. Marcus Whitman was treating both white and Cayuse patients. Most of his white patients recovered. Many of his Cayuse patients did not.

On November twenty-ninth, eighteen forty-seven, a group of Cayuse men killed Marcus Whitman, Narcissa Whitman, and eleven others at the mission. Approximately fifty people were taken hostage before eventually being ransomed.

The Whitman Mission National Historic Site is the only National Park Service unit in the lower forty-eight states whose interpretive center is built around the killing of Euro-American missionaries. The park's exhibits work explicitly to present both the settler and Cayuse perspectives on what happened in that valley in eighteen forty-seven, and why it happened.