High Quality Content by WIKIPEDIA articles! 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.