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Why did the Second Seminole War begin?

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Map of the southeastern United States showing the historical locations of various Indigenous peoples, with tribal names such as Cherokee, Chickasaw, Choctaw, Creek, Seminole, Natchez, Catawba, and Calusa labeled across the region. A red outline marks the general boundary of the Southeast cultural area, extending from eastern Texas and Louisiana through the Gulf Coast, up to the Atlantic coast and into parts of the Carolinas and Virginia. Major bodies of water like the Gulf of Mexico and the Atla
Indigenous peoples of the American Southeast

The Second Seminole War (1835–1842) began primarily due to the United States government's attempt to forcibly remove the Seminole people from their lands in Florida to a reservation west of the Mississippi River.12

This conflict was driven by several key factors:

  • Indian Removal Act: Following the 1830 Indian Removal Act, the U.S. government sought to relocate Native American tribes to make their lands available for white settlement.13
  • Disputed Treaties: While some leaders were coerced into signing agreements like the Treaty of Payne’s Landing (1832) and the Treaty of Fort Gibson (1833), many Seminoles rejected these terms and denied having agreed to leave their homes.14
  • Resistance to Removal: When U.S. officials, including General Wiley Thompson, threatened to use force to execute the removal, the Seminoles—led by figures such as Osceola—chose to resist.12

The war officially commenced on December 28, 1835, with the Dade Massacre, an ambush in which Seminole warriors attacked U.S. soldiers, followed by the killing of General Thompson on the same day.1