Defending the coast against enemy invasion from the sea or rivers. Throughout history, coastal defense has been an important mission of the military. The Roman Empire is particularly famous for building fortifications along the coast. Until World War II, coastal defense was centered on pre-constructed fortifications and positions centered around pillboxes. During World War II, the German and Japanese armies built sturdy coastal defense positions in Europe and on islands in the Pacific Ocean. Another method of coastal defense is to not defend fixed positions, but to mobilize and concentrate on the enemy's landing or landing points to destroy them. Today, due to the lessons learned from World War II and the development of weapons, countries no longer build fortifications. The issue that has the greatest impact on coastal defense is air and sea control. (→Great Fortresses of Europe) Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
海上あるいは河川からの敵の侵入に対して沿岸を防衛すること。歴史を通じて,沿岸防衛は軍隊の重要な使命であった。特にローマ帝国は沿岸に要塞を構築したことで有名である。第2次世界大戦までの沿岸防衛は,あらかじめ構築した要塞施設,トーチカなどを中心とする陣地を主体とした。第2次世界大戦中,ヨーロッパや太平洋の島々で,ドイツ軍や日本軍は堅固な沿岸防衛陣地を構築した。また沿岸防衛には,固定陣地を守らず,敵が上陸,あるいは降下した地点に機動的に集中し,撃滅する方法もある。今日では,第2次世界大戦の戦訓と,兵器の発達によって,各国とも要塞施設を造らないようになった。沿岸の防衛に最も大きな影響のあるのは,制空,制海の問題である。 (→ヨーロッパ大要塞 )
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