Fort Defiance Civil War Park & Interpretive Center – Clarksville, Tennessee Perched high above the Cumberland River, Fort Defiance stands as a living reminder of Clarksville’s Civil War past — where soldiers once watched the river bend and history changed forever. 🏞️ Built in 1861, this well-preserved earthen fort witnessed the rise and fall of empires on American soil. Today, the Fort Defiance Interpretive Center tells that story through artifacts, exhibits, and a powerful look at the people —