By 1870 the Lines no longer existed, but the two central forts in the towns of Wissembourg and Altenstadt, still possessed fortifications that proved useful defensive positions during the Battle of Wissembourg. On 4 August 1870 the Germans under the Crown Prince of Prussia, afterwards the emperor Frederick III, gained the first victory of the war over a French corps (part of the army commanded by Patrice de MacMahon) under General Abel Douay, who was killed early in the engagement.