HistoryData
Historical ConflictArkansas

Price’s Missouri Expedition

The last major Confederate operation west of the Mississippi, its failure secured Union control of Missouri and boosted Lincoln's 1864 re-election prospects.

Duration & Scope

1864 ongoing

< 1 year

Key Facts

Duration
August 29 – December 2, 1864
Theater
Trans-Mississippi Theater, American Civil War
Confederate commander
Major General Sterling Price
Geographic scope
Arkansas, Missouri, and Kansas
Decisive engagement
Battle of Westport, late October 1864

Strategic Narrative Overview

Price's column crossed into Missouri in September 1864, winning several early engagements and threatening St. Louis before Union resistance stiffened. Turned westward, his force pushed toward Kansas City but was decisively defeated by Major General Samuel R. Curtis at the Battle of Westport in late October. Retreating southward, Price suffered further heavy losses when Union cavalry under Major General Alfred Pleasonton routed his rear guard at the Battle of Mine Creek in Kansas.

01 / The Origins

By mid-1864, Confederate fortunes in the Trans-Mississippi Theater had declined sharply. Southern strategists hoped a bold cavalry raid into Missouri could recapture the state, reinvigorate Confederate support in the border region, disrupt Union logistics, and potentially sway the November 1864 presidential election against Abraham Lincoln. Major General Sterling Price was tasked with leading a large mounted force northward from Arkansas to achieve these objectives.

03 / The Outcome

Price's shattered column retreated back into Arkansas by December 2, 1864, ending the campaign in failure. The expedition secured no lasting territorial gains for the Confederacy and effectively ended large-scale Southern military operations west of the Mississippi. Its defeat strengthened Northern morale, reinforced Union control over Missouri, and contributed to President Lincoln's decisive re-election victory in November 1864.

Belligerents & Mobilization Analysis

Side A

1 belligerent

Confederate States of America
Key Commanders

Sterling Price.

Side B

1 belligerent

United States (Union)
Key Commanders

Samuel R. Curtis, Alfred Pleasonton.

Outcome
Union victory; Confederate raid repulsed; Missouri secured under Federal control

Kinetic Engagement Axis

Major engagements timeline (1864–present)Timeline of major military engagements plotted chronologically.1864present1864Battle of WestportSide B1864Battle of Mine C…Side B

Scroll horizontally to view full axis. Events plotted relatively.

Side A victorySide B victoryInconclusiveDecisive / turning point

Location

Map of United StatesMap of United StatesUnited States