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Guard tower serves as a general term for any military tower providing vigilance, and henceforth guarding a certain area. These towers are usually operated by military personnel, and are structures built in areas of established control. These include military bases and cities occupied by military forces. This type of fortification is a variation on the tower incorporated into the walls of castles from history, and are, in the modern day, equipped with such facilities as heavier weapons than those carried by infantry and searchlights. ==Notable guard towers== *Alcatraz guard towers〔(Picture of a guard tower in Alcatraz )〕 *Auschwitz II guard towers *Tower of London〔(Spooky spots and tales of the Tower of London )〕 *Yuma Territorial Prison 1876 guard tower. 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「guard tower」の詳細全文を読む スポンサード リンク
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