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SM ''U-99'' was one of the 329 submarines serving in the Imperial German Navy in World War I. U-99 was engaged in the naval warfare and took part in the First Battle of the Atlantic. == Operations == The Royal Navy submarine is credited with sinking ''U-99'' in the Northern North Sea on 7 July 1917. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「SM U-99」の詳細全文を読む スポンサード リンク
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