The Battle of Platte Bridge was the culmination of a major 1865 Lakota Sioux and Cheyenne offensive against U.S. Army positions in Wyoming.
Key Facts
- Date
- July 26, 1865
- Estimated warrior force
- 3,000 warriors
- U.S. defenders at bridge
- 120 soldiers
- U.S. soldiers killed
- 29 soldiers
- Indian casualties (minimum)
- 8 dead
- Wagon train guard size
- 28 soldiers
By the Numbers
Location
Cause → Event → Consequence
Beginning in May and June 1865, Lakota Sioux and Cheyenne warriors launched raids on U.S. Army outposts and stagecoach stations across a wide area of Wyoming and Montana. By July, the tribes had assembled a large combined force estimated at 3,000 warriors and directed their offensive toward the strategically important Platte Bridge crossing.
On July 26, 1865, a force estimated at 3,000 Lakota Sioux and Cheyenne warriors attacked the Platte Bridge station on the North Platte River, guarded by only 120 U.S. soldiers. Fighting occurred near the bridge and separately against a 28-man wagon train escort several miles away. The Indians killed 29 soldiers while suffering at least eight dead themselves.
The battle represented the high point of the summer 1865 Indian offensive against U.S. military infrastructure in the region. The U.S. Army suffered significant casualties relative to its small garrison forces, highlighting the vulnerability of its outposts along key travel and communication routes through Wyoming and Montana during this period of intensified conflict.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent