During the Civil War, the Second Colorado Volunteer Regiment played a vital and often decisive role in the fight for the Union on the Great Plains—and in the westward expansion of the American empire. Christopher M. Rein’s The Second Colorado Cavalry is the first in-depth history of this regiment operating at the nexus of the Civil War and the settlement of the American West. Composed largely of footloose ’59ers who raced west to participate in the gold rush in Colorado, the troopers of the Second Colorado repelled Confederate invasions in New Mexico and Indian Territory before wading into the Burned District along the Kansas border, the bloodiest region of the guerilla war in Missouri. In 1865, the regiment moved back out onto the plains, applying what it had learned to peacekeeping operations along the Santa Fe Trail, thus definitively linking the Civil War and the military conquest of the American West in a single act of continental expansion. Emphasizing the cavalry units, whose mobility proved critical in suppressing both Confederate bushwhackers and Indian raiders, Rein tells the neglected tale of the “fire brigade” of the Trans-Mississippi Theater—a group of men, and a few women, who enabled the most significant environmental shift in the Great Plains’ history: the displacement of Native Americans by Euro-American settlers, the swapping of bison herds for fenced cattle ranges, and the substitution of iron horses for those of flesh and bone. The Second Colorado Cavalry offers us a much-needed history of the “guerilla hunters” who helped suppress violence and keep the peace in contested border regions; it adds nuance and complexity to our understanding of the unlikely “agents of empire” who successfully transformed the Central Plains.

A look at the guerrilla warfare on the Missouri-Kansas border during the Civil War from the Southern point of view.

Finalist for the Pulitzer Prize in History A dramatic, riveting, and “fresh look at a region typically obscured in accounts of the Civil War. American history buffs will relish this entertaining and eye-opening portrait” (Publishers Weekly). Megan Kate Nelson “expands our understanding of how the Civil War affected Indigenous peoples and helped to shape the nation” (Library Journal, starred review), reframing the era as one of national conflict—involving not just the North and South, but also the West. Against the backdrop of this larger series of battles, Nelson introduces nine individuals: John R. Baylor, a Texas legislator who established the Confederate Territory of Arizona; Louisa Hawkins Canby, a Union Army wife who nursed Confederate soldiers back to health in Santa Fe; James Carleton, a professional soldier who engineered campaigns against Navajos and Apaches; Kit Carson, a famous frontiersman who led a regiment of volunteers against the Texans, Navajos, Kiowas, and Comanches; Juanita, a Navajo weaver who resisted Union campaigns against her people; Bill Davidson, a soldier who fought in all of the Confederacy’s major battles in New Mexico; Alonzo Ickis, an Iowa-born gold miner who fought on the side of the Union; John Clark, a friend of Abraham Lincoln’s who embraced the Republican vision for the West as New Mexico’s surveyor-general; and Mangas Coloradas, a revered Chiricahua Apache chief who worked to expand Apache territory in Arizona. As we learn how these nine charismatic individuals fought for self-determination and control of the region, we also see the importance of individual actions in the midst of a larger military conflict. Based on letters and diaries, military records and oral histories, and photographs and maps from the time, “this history of invasions, battles, and forced migration shapes the United States to this day—and has never been told so well” (Pulitzer Prize–winning author T.J. Stiles).