AP® United States History · Unit 6 · Topic 6.3
The Plains Wars and the Buffalo
The United States broke Plains nations not mainly through battles but by destroying the bison herds they depended on, then forcing treaty after treaty that shrank reservation land until resistance was no longer possible.
The Plains wars stretched from the 1860s into the 1890s as the Lakota, Cheyenne, Comanche, and other nations fought to hold land against US expansion. Conflict flared along the Bozeman Trail in the 1860s, where Lakota resistance under Red Cloud won real concessions, and climaxed in 1876 at Little Bighorn, where the Lakota and their allies wiped out Custer's column. It ended in 1890 at Wounded Knee, where the US Army killed several hundred Lakota men, women, and children, closing the era of organized armed resistance.
The deeper weapon was not the rifle but the bison. Tens of millions of bison roamed the Plains in the 1860s; commercial hide hunters, railroads that split the herds and hauled out hides, and a government that saw bison slaughter as a way to starve Native resistance into submission drove that number down to a few hundred animals within about twenty years. Since bison were the foundation of Plains food, clothing, shelter, and trade, their collapse destroyed the economic base that let nations like the Lakota resist. Hungry, without their livelihood, Plains peoples faced overwhelming pressure to accept reservation life.
That pressure worked treaty by treaty. Agreements like Fort Laramie in 1851 and 1868 promised defined territories, but each broken promise, discovered gold field, or new rail line brought a renegotiation that cut Native landholdings further. This is why Little Bighorn, a stunning tactical win, changed nothing structurally: the US could absorb one defeat and keep sending resources, while the Lakota could not replace lost bison, land, or population. The episode previews later federal Indian policy, including the Dawes Act's push to break up reservations entirely.
Key terms
- Bozeman Trail
- A route to Montana goldfields through Lakota hunting grounds that sparked Red Cloud's War in the 1860s.
- Little Bighorn
- An 1876 battle in which the Lakota and Cheyenne annihilated Custer's cavalry, a tactical win with no lasting strategic effect.
- Reservation system
- US policy confining Native nations to fixed, shrinking tracts of land, often reduced further by later treaties.
- Wounded Knee
- An 1890 massacre of Lakota by the US Army that marked the end of organized Plains resistance.
- Hide hunting
- Commercial slaughter of bison for their skins, encouraged by railroads and government policy, that collapsed herd numbers.
Watch it explained
- How it worksWalk me through the Plains wars on a map from the Bozeman Trail to Little Bighorn to Wounded Knee.
- Worked exampleShow me the bison herd falling from tens of millions to a few hundred animals in twenty years.
- How it worksHow does the reservation system shrink Native land holdings treaty by treaty?
- Common mistakeWhy isn't Little Bighorn a turning point that changed the outcome of the Plains wars?
Check yourself
End of topic.