Who is Coacoochee from The Everglades: River of Grass and what is their importance?

Coacoochee was the son of the Indian king, Philip, when, along with his father, was imprisoned at St. Augustine in September 1837 over the issue of migration to the west. He escaped. Known as Wildcat, he continued to fight the relocation attempts of the government. He was arrested and sent to New Orleans and then returned to Florida. Eventually, he and the others were sent to New Orleans.