The Siege of Mogilev was a three-week encirclement of Mogilev undertaken by German troops, part of the Battle of Smolensk. After the beginning of Operation Barbarossa, the German invasion of the Soviet Union, German troops broke through Soviet lines. Mogilev was heavily fortified and bypassed by German tank forces. German infantry steadily reduced the pocket, and by late July, the defending Soviet troops had run out of ammunition and other necessary supplies. As a result, Soviet commander Fyodor Bakunin went against orders and ordered a breakout. A small number of Soviet troops were able to reach Soviet lines, and 35,000 were reported captured by German troops. The defense of Mogilev tied down four German infantry divisions, delaying their attack on Gomel for a week.