Tamsen Donner and the Donner Party

In 1846, the United States and Great Britain settled a boundary dispute that had simmered for nearly three decades—accepting a compromise at the 49th parallel rather than the 54°40′ line that expansionists had rallied around with the slogan “Fifty-Four Forty or Fight.”

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Lansford Hastings and the Cutoff That Cost Weeks

In 1845, Lansford Hastings published a guidebook proposing a California shortcut he had never traveled. In 1846, after crossing part of the route on horseback, he urged wagon parties onto terrain that still had to be cleared and built into a road.

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Narcissa Whitman: The Letters That Made Oregon Imaginable

Her 1836 journey and the letters she sent home did not create the Oregon Trail migration by themselves—but they made the overland road thinkable for the families who followed, even as her mission helped intensify the colonial pressures that would end her life.

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