In June 1941 Nazi Germany launches Operation Barbarossa, a three-pronged invasion of the Soviet Union that opens the deadliest campaign of the Second World War. This History Hit documentary builds its account from rare amateur film shot by soldiers on both sides, alongside diaries and letters from German and Soviet troops and civilians caught in the path of the advance. It tracks the massive encirclement battles at Minsk and Kiev, where entire Soviet armies are trapped and destroyed, then follows the war's escalating brutality through Stalin's Order Number 270, which brands captured soldiers traitors, and the mass killings at Babi Yar outside Kiev. The footage is unfiltered rather than sanitized for a general audience, showing the campaign's violence directly instead of through reenactment. Narration threads the personal accounts together with the strategic picture, keeping the human cost of the advance in view alongside the map of it. The result is a ground-level record of how the Eastern Front turned into the war's most destructive theater within months.