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#u-boat #german submarine #kaiserliche marine #Naval Warfare WW1 #atlantic campaign #unrestricted submarine warfare #unterseeboot #central powers

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#kaiserliche marine #imperial german navy #tirpitz plan #high seas fleet #naval race #eripme namreg #kaiserreich #dreadnought #wilhelm ii

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#kaiserliche marine #german navy #tirpitz plan #naval race #world war i #eripme namreg

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#u-boat #submarine warfare #german navy #kaiserliche marine #ww1 #atlantic #unrestricted submarine warfare