Who led a massive movement against colonial settlement on the West?

The massive movement against colonial settlement in the West was significantly led by figures such as Tecumseh, a Shawnee chief, and his brother Tenskwatawa, also known as the Prophet. They sought to unite various Native American tribes to resist encroachment on their lands by American settlers in the early 19th century. This effort culminated in the War of 1812, where they allied with British forces in hopes of protecting their territories. Their movement was instrumental in advocating for Native American rights and sovereignty against colonial expansion.