Davy Crockett makes a stand at The Alamo; President Polk risks war with Britain and Mexico, sending John Fremont and Kit Carson on a secret mission that ignites a war for California and the Pacific. See more in Season 1, Episode 4, "Empire of Liberty." #TheMenWhoBuiltAmericaFrontiersmen Subscribe for more from The HISTORY Channel: http://histv.co/SubscribeHistoryYT Find out more about this and other specials on our site: http://www.history.com Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Twitter - https://histv.co/Twitter “The Men Who Built America: Frontiersmen” spans a formative period of history featuring the first 75 volatile years of the United States – from the Revolution through the California Gold Rush – where Daniel Boone, Meriwether Lewis and William Clark, John Frémont, Davy Crockett and Andrew Jackson set forth across uncharted land with determination and self-reliance. The HISTORY® Channel, a division of A+E Networks, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok. For additional press materials visit the A+E Networks Press Center at http://press.aenetworks.com.