Glacis in the context of "Siege of Ochakov (1788)"

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⭐ Core Definition: Glacis

A glacis (/ˈɡl.sɪs/, French: [ɡlasi]) in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more permanent structure. More generally, a glacis is any slope, natural or artificial, which fulfils the above requirements. The etymology of this French word suggests a slope made dangerous with ice, hence the relationship with glacier.

A glacis plate is the sloped front-most section of the hull of a tank or other armoured fighting vehicle.

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👉 Glacis in the context of Siege of Ochakov (1788)

The siege of Ochakov (Russian: осада Очакова) or the siege of Özi (Turkish: Özi Kuşatması), now Ochakiv, Ukraine, was one of the major events of the Russo-Turkish War (1787–1792). The Ochakov Fortress had the appearance of an irregular quadrangle, consisting of low bastions with a dry moat and glacis on the dry side, and a simple stone wall on the sea side. In addition, 10 advanced lunettes built later extended from the dry side. From the sea, fort Hasan Paşa reinforced the defense. By the time the Russians began the siege, the fortress was a strong fence, but was not able to withstand an active, energetic storming for long. Ochakov was not what it was in the old days, under Münnich in 1737, but it still did not represent an impregnable stronghold that required enormous preparations and expenditure of time. Besieging in summer and autumn, with the arrival of winter, the supreme commander Potemkin decided to stop the siege works and begin the storming of Ochakov (Russian: штурм Очакова) on 17 December [O.S. 6 December] 1788, which ended in Russian success and capture of Hüseyin Pasha, the chief of garrison.

In 1788, Russian forces led by the commander in chief Prince Grigory Potemkin, General Alexander Suvorov, who was called here from near Kinburn Spit with his Phanagorian Regiment and commanded the left wing (until injury and replacement), Prince Nikolai Repnin (the center) and Ivan Möller (the right wing) besieged the city, held by Ottoman troops massively assisted at sea by Hasan Pasha, whose knowledge exceeded the Turkish military level of that time, and commanded by Hüseyin Pasha. Despite Suvorov's urging to storm the city immediately, Potemkin had the Russian forces encircle Ochakov (Özi), bombarding the city and cutting off the defenders' supply of food and ammunition. By keeping his soldiers out of direct battle, Potemkin strove to minimize Russian combat-casualties, though he was accused by his generals, including Suvorov, of cowardice, and the Turks organized several sorties from the fortress and in everyway interfered with the siege at sea. The argument within the Russian headquarters about storming Ochakov continued during the entirety of the siege. The rowing flotilla was commanded by Prince Karl (Charles) Nassau-Siegen, the sailing fleet by Paul Jones, a fighter for American independence; the latter stood in subordination of the first. There was no great agreement between them. Nassau and Jones were subordinate to Potemkin.

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Glacis in the context of Fortifications of Rhodes

The fortifications of the town of Rhodes are shaped like a defensive crescent around the medieval town and consist mostly of a fortification composed of a huge wall made of an embankment encased in stone, equipped with scarp, bastions, moat, counterscarp and glacis. The portion of fortifications facing the harbour is instead composed of a crenellated wall. On the moles, towers and defensive forts are found.

They were built by the Knights Hospitaller of Saint John by enhancing the existing Byzantine walls starting from 1309, the year in which they took possession of the island after a three-year struggle.

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Glacis in the context of Castillo San Cristóbal (San Juan)

Castillo San Cristóbal (English: Saint Christopher Castle) is a fortress in the Old San Juan historic quarter of San Juan, the capital municipality of Puerto Rico, known for being the largest fortification built by the Spanish in the New World. Dating back to defense expansions following attacks by the English in 1598 and Dutch in 1625, it was first constructed in 1634 as the Caballero de San Miguel (Saint Michael Cavalier) and the Garita del Diablo ("devil’s sentry box"). Over the next 150 years, especially in the reign of King Charles III of Spain, it continued to be developed into a bastion fort with outer ravelins and batteries to reach its largest size in 1783. Rising 150 ft from the Atlantic shoreline, the three-level edifice stands on a hill at the northern coastline of San Juan Islet, guarding the land entry to Old San Juan. Alongside El Morro, La Fortaleza, and other forts part of the Walls of Old San Juan, it protected strategically and militarily important Puerto Rico, or La Llave de las Indias (The Key to the Indies), from invasion by competing world powers during the Age of Sail. It was designated a World Heritage Site by UNESCO in 1983.

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