Great Plains Forts introduces readers to the fortifications that have impacted the lives of Indigenous peoples, fur trappers and traders, travelers, and military personnel on the Great Plains and prairies from precontact times to the present. Using stories to introduce patterns in fortification construction and use, Jay H. Buckley and Jeffery D. Nokes explore the eras of fort-building on the Great Plains from Canada to Texas. Stories about fortifications and fortified cities built by Indigenous peoples reveal the lesser-known history of precontact violence on the plains. Great Plains Forts includes stories of Spanish presidios and French and British outposts in their respective borderlands. Forts played crucial roles in the international fur trade and served as emporiums along the overland trails and along riverway corridors as Euro-Americans traveled into the West. Soldiers and families resided in these military outposts, and this military presence in turn affected Indigenous Plains peoples. The appendix includes a reference guide organized by state and province, enabling readers to search easily for specific forts.