US Government policy: From the Indian Removal Act (1830) to the Dawes Act (1887), federal policy consistently aimed to remove or assimilate Native peoples and open their lands to white settlement.
Military superiority: The US Army, with modern weapons, supply lines via the railroad, and virtually unlimited reinforcements, could outlast any Native resistance. Individual victories (like Little Bighorn) could not change the long-term balance of power.
Destruction of the buffalo: The deliberate or commercially-driven slaughter of 30-60 million buffalo destroyed the economic and cultural foundation of Plains Indian life. Without buffalo, the Plains peoples could not feed themselves through their traditional way of life.
Disease: European diseases (smallpox, measles, cholera) to which Native Americans had no immunity had already devastated populations across the continent for centuries before the 19th century conflicts.
= By 1890: Most Native Americans were confined to reservations — often on barren land far from their traditional territories. Wounded Knee (1890) ended armed resistance. The "frontier" was declared closed.
This causation covers Why Did Native Americans Lose Their Lands? within The Making of America, 1789-1900 for GCSE History. Revise The Making of America, 1789-1900 in Component Group 4 — Period Studies for GCSE History with 14 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 8 of 16 in this topic. Use this causation to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for The Making of America, 1789-1900
Describe two features of the Louisiana Purchase of 1803.
Describe two features of the Indian Removal Act of 1830.
Quick recall flashcards
What was the Missouri Compromise of 1820?
An agreement to maintain the balance between slave and free states. Missouri entered as a slave state, Maine as a free state. A line at 36°30' N latitude was drawn — slavery permitted south of it, banned north of it. It preserved the Union for 30 years until the Kansas-Nebraska Act (1854) repealed it, leading to 'Bleeding Kansas' — a guerrilla war between pro-slavery and anti-slavery settlers.
What was Manifest Destiny?
The belief, coined by journalist John O'Sullivan in 1845, that it was God's plan for the United States to expand across the entire North American continent. It provided moral justification for displacing Native peoples, annexing Texas, and fighting the Mexican-American War. Millions of Americans genuinely believed in it as a divine mission.