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    Bunker System - thirdreichruins.com. Obersalzberg. Air Raid Shelters (Tunnel and Bunker Systems) When the Allied bombing campaign over the Third Reich became a reality in 1943, Reichsleiter Martin Bormann was forced to order the construction of a series of air raid shelters and command posts for the residents and military staff of the Obersalzberg.

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  • Methods of Tunnel Construction and Their Details

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