Vauban in the context of "Gustave Crauk"

Saarlouis (German: [zaːɐ̯ˈlʊɪ̯] ; French: Sarrelouis, [saʁlwi]; formerly Sarre-Libre and Saarlautern) is a town in the state of Saarland, in western Germany, located on the banks of the Saar river. With a population of over 37,000 (2024), it is the fifth-largest city of Saarland and serves as an important regional center. Saarlouis lies near the border with France and Luxembourg. The town functions as the administrative seat of the district of Saarlouis and is part of the cross-border SaarLorLux Euroregion.

Saarlouis was founded in 1680 by order of Louis XIV of France as a fortress town designed by the military engineer Vauban. The stronghold was intended to secure France’s new frontier after the Treaty of Nijmegen. The star-shaped fortifications gave the city its characteristic layout, parts of which remain visible today. Saarlouis became part of Prussia following the Treaty of Paris of 1815.

The Château de Brest (Breton: Kastell Brest, pronounced [ˈkastɛl bʀest]) or Castle of Brest is a castle in Brest, Finistère, Brittany, France. The oldest monument in the town, it is located at the mouth of the river Penfeld at the heart of the roadstead of Brest, one of the largest roadsteads in the world. From the Roman castellum to Vauban's citadel, the site has over 1700 years of history, holding right up to the present day its original role as a military fortress and a strategic location of the highest importance. It is thus the oldest castle in the world still in use, and was classified as a monument historique on 21 March 1923.

The structure's heterogeneous architecture has been the result of continual adaptations to developments in siege warfare and armament on land and sea. The château stands on the opposite bank to the Tour Tanguy combining to defend the entrance to the Penfeld.

A redoubt (historically redout) is a fort or fort system usually consisting of an enclosed defensive emplacement outside a larger fort, usually relying on earthworks, although some are constructed of stone or brick. It is meant to protect soldiers outside the main defensive line and can be a permanent structure or a hastily constructed temporary fortification. The word means "a place of retreat". Redoubts were a component of the military strategies of most European empires during the colonial era, especially in the outer works of Vauban-style fortresses made popular during the 17th century, although the concept of redoubts has existed since medieval times. A redoubt differs from a redan in that the redan is open in the rear, whereas the redoubt was considered an enclosed work.

The siege of Namur, 25 May–30 June 1692, was a major engagement of the Nine Years' War, and was part of the French grand plan (devised over the winter of 1691–92) to defeat the forces of the Grand Alliance and bring a swift conclusion to the war. Namur, sitting on the confluence of the Meuse and Sambre rivers, was a considerable fortress, and was a significant political and military asset. French forces, guided by Vauban, forced the town's surrender on 5 June, but the citadel, staunchly defended by Menno van Coehoorn, managed to hold on until 30 June before capitulating, bringing an end to the 36-day siege. Concerned that King William III planned to recapture the stronghold, King Louis XIV subsequently ordered his commander-in-chief, the duc de Luxembourg, to join battle with the Allies in the field, resulting in the bloody Battle of Steenkerque on 3 August.