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Ostrog (Russian: острог, IPA:) is a Russian term for a small fort, typically wooden and often non-permanently staffed. Ostrogs were encircled by 4–6 metres high palisade walls made from sharpened trunks. The name derives from the Russian word строгать (strogat'), "to shave the wood".
Reinforced wood door. A typical exterior wooden door might be made out of two or more layers of oak planks. The grain of the wood would run vertically on the front layer and horizontally on the back, like a simple form of plywood. The two layers would be held together by iron studs, and the structure might be strengthened and stiffened with ...
The structure of Fort Wood on Liberty Island in New York City, United States, was used for the foundation of the Statue of Liberty. In the nineteenth century, with the development of more powerful artillery and explosive shells, star forts were replaced by simpler but more robust polygonal forts. In the twentieth century, with the development ...
An 1868 plan of Fort I of the ring fortress at Magdeburg, typical of mid-19th century polygonal forts. A polygonal fort is a type of fortification originating in France in the late 18th century and fully developed in Germany in the first half of the 19th century.
The pillars supported a raised floor to keep food dry and free from vermin in the northern granary at Housesteads Roman Fort (Vercovicium) on Hadrian's Wall. Ordinary camp life began with a buccina call at daybreak, the first watch of the day. The soldiers arose at this time and shortly after gathered in the company area for breakfast and assembly.
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The profile of the fort became very low indeed, surrounded outside the ditch covered by caponiers by a gently sloping open area so as to eliminate possible cover for enemy forces, while the fort itself provided a minimal target for enemy fire. The entrypoint became a sunken gatehouse in the inner face of the ditch, reached by a curving ramp ...