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 in total).
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 [REF].