Fort Croghan began in 1849 near Hamilton Creek in Burnet, Texas, as one of the first federal frontier forts created after Texas annexation made settler protection a U.S. responsibility. Built by soldiers and named for Colonel George Croghan, the post formed part of a defensive chain across the Texas frontier during growing conflict as settlement advanced into Comanche and Apache hunting grounds. Its garrison and supply needs helped spur the nearby community that became Burnet, drawing merchants, contractors, and former soldiers into local life. Abandoned in 1853 after serving its purpose, the site later survived through local preservation and now functions as a historical park and museum.