The Louisiana Purchase doubled America’s size—but "Manifest Destiny" took it all the way to the Pacific. This episode—based on a PragerU Kids biographical book—brings to life a bold chapter of westward expansion, where men like John C. Frémont and President James K. Polk risked everything to have a country from "sea to shining sea." Teach your teens about Frémont's role in exploring the Midwest, winning California's independence from Mexico, and standing for freedom by supporting the abolition of slavery.