The Mariposa War began in 1850 when miners entered the Sierra Nevada foothills, traditionally occupied by the Ahwahnechee, a band of the Southern Sierra Miwok people. The discovery of gold in the region sparked conflict as miners began to take over the Ahwahnechee's land and resources, creating escalating tensions between the two groups.
The Ahwahnechee, led by their chief Tenaya, fought back against the miners in a series of skirmishes that escalated into a full-scale war. The California state government, under Governor John McDougall, responded by raising the Mariposa Battalion, which was led by Sheriff James D. Savage to subdue the indigenous people. This military expedition proved historically significant as the Mariposa Battalion became the first non-indigenous group to enter Yosemite Valley and the Nelder Grove.
The war ended in 1851 with the capture of Tenaya and the surrender of his band. The conflict resulted in the removal of the Ahwahnechee from their traditional lands, marking a pivotal moment in the dispossession of indigenous peoples in California during the Gold Rush era.
The early republic period saw the United States move from the weak Articles of Confederation to the federal Constitution ratified in 1788, with the Bill of Rights added in 1791. George Washington served two terms as president (1789–1797), establishing precedents for executive authority, and the federal capital moved permanently to Washington D.C. in 1800. The Louisiana Purchase (1803) doubled the nation's territory for roughly $15 million, opening vast trans-Mississippi lands to American expansion. The War of 1812 against Britain ended inconclusively but produced a surge of American national identity and eliminated most British support for Indigenous resistance east of the Mississippi. The Northwest Indian Wars (1785–1795) and the Creek War (1813–1814) broke Indigenous confederacies that had resisted US expansion. The Missouri Compromise of 1820 temporarily balanced slave and free states as the nation expanded westward, but embedded the contradiction of slavery in every subsequent territorial debate.
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