History of Montana Timeline

Responding to rampant lawlessness and road agent robberies during the gold rush, citizen vigilance committees hanged Sheriff Henry Plummer and members of his alleged gang of road agents. The vigilante movement became legendary in Montana history, though modern historians debate whether Plummer truly led the gang.

Image source: Henry Plummer

President Abraham Lincoln signed the act creating Montana Territory out of portions of Idaho and Dakota territories, with Sidney Edgerton serving as its first governor. The name derived from the Spanish word 'montaña,' meaning mountain, reflecting the region's rugged landscape.

Image source: Montana Territory

President Benjamin Harrison proclaimed Montana the 41st state after voters ratified its constitution. Helena replaced Virginia City as the capital, and Joseph Toole was elected the new state's first governor as Montana entered the Union amid rapid economic growth.

Image source: History of Montana

Lakota, Northern Cheyenne, and Arapaho forces led by Sitting Bull and Crazy Horse decisively defeated Lieutenant Colonel George Armstrong Custer's 7th Cavalry along the Little Bighorn River in southeastern Montana. Custer and over 260 of his men were killed in one of the most famous battles of the Great Sioux War.

Image source: Battle of the Little Bighorn

After a 1,170-mile fighting retreat toward Canada, Chief Joseph's band of Nez Perce was intercepted by U.S. Army forces in northern Montana. Following a siege, Joseph famously surrendered, delivering his poignant speech declaring he would 'fight no more forever.'

Image source: Battle of Bear Paw

Under pressure from expanding railroads and settlers, the Crow Nation ceded millions of acres of its reservation in south-central Montana through successive agreements. The reductions dramatically shrank tribal lands, part of a broader pattern of dispossession across the territory.

Image source: Crow Indian Reservation

The Confederated Salish and Kootenai Tribes assumed management of the National Bison Range on their reservation in western Montana and later co-managed it with the federal government. In 2020, Congress transferred the range fully into trust ownership, returning stewardship of the refuge and its bison herd to the tribes.

Image source: CSKT Bison Range

After more than 150 years of effort and decades of petitions, the Little Shell Tribe of Chippewa Indians of Montana received formal federal recognition. The landless tribe, descended from Ojibwe who migrated west, finally gained government-to-government status with the United States.

Spurred by the Enlarged Homestead Act, promotional railroads, and wet years, hundreds of thousands of homesteaders poured into eastern Montana to claim 320-acre plots. The population boom collapsed when drought and depression struck in the 1920s, emptying many rural counties.

Image source: Homestead Acts

President William Howard Taft signed legislation creating Glacier National Park, preserving over a million acres of spectacular peaks, glaciers, and alpine lakes in northwestern Montana. The park became a centerpiece of tourism and conservation in the American West.

Image source: Glacier National Park (U.S.)

Four years before national women's suffrage, Montanans elected Jeannette Rankin to the U.S. House of Representatives, making her the first woman ever seated in Congress. A committed pacifist, she voted against U.S. entry into both World War I and World War II.

Image source: Jeannette Rankin

Years of drought, plummeting crop prices, and bank failures ravaged Montana's farm economy beginning in 1919. Tens of thousands left the state, banks closed across the plains, and Montana suffered some of the hardest economic times of any state during the interwar period.

Image source: Great Depression in the United States

As a flagship Public Works Administration project, thousands of workers built the enormous earthen Fort Peck Dam on the Missouri River, the largest hydraulic-fill dam in the world. The project employed over 10,000 people and created the town of Wheeler and the Fort Peck Lake reservoir.

Image source: Fort Peck Dam

After more than a decade of difficult construction, the Going-to-the-Sun Road opened, crossing the Continental Divide at Logan Pass. It was the first road designed specifically for automobile sightseeing in a national park and is now a National Historic Landmark.

Image source: Going-to-the-Sun Road

Roughly one-tenth of Montana's population served in the armed forces during World War II — one of the highest per-capita rates in the nation. The state also contributed metals from Butte's mines, agricultural products, and prisoner-of-war and internment camps, including one holding Japanese Americans at Fort Missoula.

Image source: Montana World War II Army Airfields

Driven by remote work migration and lifestyle appeal, Montana ranked among the nation's fastest-growing states following the 2020 census. Rapid growth in Bozeman, Missoula, and the Flathead Valley brought economic vitality but also rising housing costs and debates over land use and conservation.

Image source: Montana