Encirclement - Intimidation

…Forts are divided into land forts and coastal forts according to their location, into large forts and small forts according to their size, and into permanent forts and temporary forts according to the period of construction. Large land forts were built at the most important strategic points, and usually contained military buildings and resource-rich residential areas inside. They generally consisted of various defensive lines, including forward positions, a main defensive line, an inner defensive line, a enclosure, and multiple enclosures. The enclosure was tasked with protecting the core against enemy surprise attacks and continuing resistance even after the inner defensive line had fallen, while multiple enclosures were the positions for making the final resistance after the enclosure had fallen. …

*Some of the terminology explanations that mention "enclosure" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…所在地により陸地要塞と海岸要塞，規模の大小により大要塞と小要塞，構築の期間により永久要塞と臨時要塞に分けられる。陸地大要塞は，最も重要な戦略要点に建設されたもので，その内部に軍用建築物や資源豊富な住民地を包含するのを通常とし，一般に，前進陣地，本防御線，内部防護線，囲郭，複郭などの諸防御線からなっている。囲郭は，敵の奇襲にたいし核心を防護し，また内部防御線陥落後も抵抗を持続するのを任務とし，複郭は，囲郭陥落後も最後の抵抗を行う陣地であった。…

※「囲郭」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報