Battle of Lützen
The garrison marched out with the honours of war on 23 August and Pappenheim and Don Gonzalo, who were still camped nearby but were running low on supplies, withdrew. Frederick Henry's feat in capturing Maastricht dismayed the Spanish, who made negotiations for peace, but their resolve was stiffened a few months later by the death of the Swedish Protestant hero Gustavus Adolphus at the Battle of Lützen on 16 November.