A ravelin is a triangular or star-shaped fortification built in front of a main defensive wall or structure, designed to protect the entrance and enhance the overall defense of a fort or castle. It serves as an additional layer of defense, allowing defenders to fire upon attackers from multiple angles while providing a safe area to retreat. The ravelin typically consists of earthworks or masonry and is placed at a distance from the main walls, which helps to absorb and deflect enemy assaults. This architectural feature is commonly found in military designs from the Renaissance and early modern periods, contributing to the strategic complexity of fortifications and improving their ability to withstand sieges.

Định nghĩa và ý nghĩa của "ravelin"trong tiếng Anh

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