Molotov Line

The so-called Molotov Line was a system of border fortified regions built by the Soviet Union in the years 1940–1941 along its new western borders. These borders were the result of the Occupation of the Baltic States, Eastern Poland and Bessarabia in 1940.

The line stretched from the Baltic Sea to the Carpathian Mountains. It was made up of thirteen fortified regions, most covering about 100 km of the border. It was a part of the larger Soviet defence network along its western borders, stretching from the Arctic Ocean to the Black Sea.

Each fortified region (in Russian ukreplennyi raion, or UR) consisted of a large number of concrete bunkers (pillboxes) armed with machineguns, antitank guns and artillery. The bunkers were built in groups for mutual support, each group forming a centre of resistance. A dedicated military unit was permanently assigned to man each region.

When Nazi Germany attacked the Soviet Union on June 22, 1941 during the course of Operation Barbarossa, most of the line was not yet finished, and hence posed a negligible obstacle to the invading forces. Only the four southernmost regions, partly completed, were able to hamper the advance of the Wehrmacht for a few days. (The Brest Fortress resisted much longer, but it was an older fortification technically not part of the Molotov line).