Pearl Harbor pulls a reluctant United States into a war it had spent two years watching from the sidelines, and this episode of Price of Empire tracks what that entry actually meant for the fighting in 1942. Archival footage of the December 1941 attack opens the film, followed by newsreels and period photographs covering the scramble to convert American industry and manpower into a fighting force capable of reaching two oceans at once. Historians walk through the strategic choices that followed: the decision to prioritize Europe over the Pacific, the buildup of the arsenal of democracy, and the early, costly campaigns that tested untested American forces against battle-hardened Axis armies. The film treats Pearl Harbor not as an isolated disaster but as the hinge point that reshaped Allied strategy for the rest of the war, showing how quickly a nation without a standing army for global war had to build one. Expert interviews are cut against wartime footage throughout, keeping the narrative grounded in specific battles and decisions rather than broad summary.