The Dutch mobile army (about 16,000 strong) was reinforced with Austrian infantry and auxiliaries under command of Major-General
Count Baillet de Latour and Austrian artillery under Major-General
Johann Kollowrat (about 4,000). On 18 April 1794 this corps left its camp near
Cambrai and marched on Landrecies. On 19 April the force made preparations and on 20 April the corps opened a three-pronged attack on the fortress. Two columns marched via
Fontaine-au-Bois and the
Forêt de Mormal toward the
Sambre river, where they took the villages of Hapegarde, Etoguis and the reinforced camp of Preux-au-Bois, within range of the artillery of the fortress. The Swiss Guards of the brigade of De Gumoëns and the brigade of Hesse-Darmstadt distinguished themselves in this fight. The middle column overran the
redoubts and
demi-lunes of the outer fortress. The garrison of the fortress was forced to withdraw within its walls. The Dutch losses were 23 officers and 358 other ranks. The city would later collectively receive the
Légion d'Honneur for its bravery. Despite the severe losses the garrison commander, general Roulland, at first refused repeated demands to surrender, possibly because the French launched a desperate last attempt to relieve the fortress on 27 April, but this again came to nothing. This was immediately granted, and followed by protracted negotiations about a
capitulation on terms. The negotiations were conducted by the Dutch quarter-master-general Bentinck and the Austrian major-general
Mack on the Coalition side, and general Roulland on the French side. They led to the capitulation with honor of the French garrison on 30 April. The garrison had been reduced to 5,000 men. They became prisoners-of-war in the Dutch Republic. The fortress was taken over by Swiss and Dutch Guard regiments. ==Aftermath==