Listen to the Summary of William Craig's Enemy at the Gates in 20 minutes. Please note: This is a summary & not the original book. In June 1942, Hitler launched Operation Blue, a campaign to strangle Russia's oil production and therefore her potential to wage modern war. The German Army easily penetrated the outskirts of Voronezh and commanders radioed for permission to seize the city. Hitler vacillated, leaving the decision to Army Group B's commander, Field Marshal Fedor von Bock...