Watch Online Free on Watchseries. Crucible of Empire demonstrates how and why the Spanish-American War constitutes such an important milestone in U.S. history. This program examines the events and attitudes that led to war, followed by an exploration of the conflict and its outcome. Early film footage and stills of battle scenes, plus rich visuals, a compelling story, and intriguing analogies to current foreign policy make Crucible of Empire a riveting documentary.