Historedia
AmericasEvent

Utah Expedition departs Fort Leavenworth, beginning the Utah War

When
1857
Where
Fort Leavenworth, Kansas
Episodes
1

The Utah Expedition departed Fort Leavenworth in July 1857, initiating the armed confrontation between US forces and Mormon settlers. Although gathering began in May, the first soldiers left on July 18, with subsequent troop movements occurring in September. This departure followed political pressure on President Buchanan and rising tensions in the Utah Territory.

Episodes

  1. 18 July 1857 · Fort Leavenworth, KansasUtah Expedition Departure

    The first soldiers of the Utah Expedition left Fort Leavenworth on 18 July 1857, beginning the armed confrontation with Mormon settlers.

Background and detail

Background. The Utah War was an armed confrontation between US government forces and Mormon settlers in the Utah Territory. President Buchanan decided to take decisive action against the Mormons soon after his inauguration in March 1857. The situation was exacerbated by the Mormon Reformation and Drummond's resignation, which alleged that Young's power set aside the rule of law.

Expedition Departure. The Utah Expedition began to gather as early as May 1857 under orders from General Winfield Scott. However, the first soldiers did not leave Fort Leavenworth, Kansas, until 18 July 1857. This departure marked the effective beginning of the Utah War, which lasted from May 1857 to July 1858.

People involved

Sources

  1. Utah War Wikipedia, revision of 2026-09-20

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.