KnowraUnrestricted submarine warfareLinked fromLinked fromThe 13 pages that link to Unrestricted submarine warfare, each with the reason it gives.All 13Broader topic 1Related 8Narrower topic 1Compared with 3World War IRelated: German submarine attacks helped bring the United States into the war.Erich LudendorffRelated: Ludendorff supported its 1917 resumption despite the risk of bringing the United States into the war.ConvoyRelated: Its adoption made unescorted merchant traffic exceptionally vulnerable.Anglo-German naval arms raceBroader topic: It became a more consequential German naval strategy than direct battleship competition during the war.Zimmermann TelegramRelated: Germany’s resumption of this policy risked bringing the United States into the war.Alfred von TirpitzRelated: After leaving office, Tirpitz supported this policy, which helped bring the United States into the war.Imperial German NavyCompared with: It became a more consequential German maritime strategy than battleship combat, but carried severe diplomatic costs.Karl DönitzRelated: Dönitz's prosecution focused partly on Germany's submarine warfare and its treatment of shipwreck survivors.U-boatRelated: Germany adopted it in both world wars to counter Allied maritime supply.Theobald von Bethmann HollwegCompared with: Bethmann Hollweg warned that this policy risked bringing the United States into the war, but accepted its resumption in 1917.Ernest J. KingRelated: King authorized this policy against Japanese shipping after the United States entered the war.Lothar von Arnauld de la PerièreCompared with: This later German policy differed sharply from the warning-and-evacuation practices often associated with his patrols.Sinking of RMS LusitaniaNarrower topic: Lusitania’s sinking became a defining example of the strategy’s human and diplomatic costs.