Mannerheim Line, Fortification line in Leningrad Oblast, Russia.
The defensive system spans 135 kilometers between the Gulf of Finland and Lake Ladoga, featuring reinforced concrete bunkers and artillery positions.
Finnish military engineers constructed 168 fortified positions between 1920 and 1924, establishing a strategic barrier against potential Soviet advances.
Finnish commanders named this defense network after Marshal Carl Mannerheim, who initiated the fortification plans in 1918.
The defense line incorporates natural terrain features, including dense forests, numerous lakes, and granite rock formations to enhance its defensive capabilities.
The fortification contained 221 concrete structures, including 150 machine gun bunkers and 8 artillery positions, which delayed Soviet forces for two months.
Location: Leningrad Oblast
Inception: 1920
Made from material: reinforced concrete
GPS coordinates: 60.50000,29.41667
Latest update: May 26, 2025 19:42
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