Recalled to active duty at the outbreak of war in 1870, the academy president was given command of a
division under
Marshal Patrice de Mac-Mahon at the frontline, The subsequent
Battle of Wissembourg (4 August 1870) proved a disaster for the French. Demoralized by the loss of their commander, On 3 August 1870, the 61-year-old Douay led the forward division of Mac-Mahon's army group, a force of approximately 8,600, into the frontier town of Wissembourg in
Alsace, the border region between the two combatant nations. Faulty intelligence had characterized the
Prussians' border positions as weak and unready, At 8:30am the next day, batteries of undetected Prussian artillery began pummelling the French position, and though Douay attempted a rapid defensive posture, The massive scale of the attack quickly became apparent – total Prussian forces are estimated between 50,000 and 80,000. The withdrawal turned into a rout, with over 1,000 French soldiers killed and a thousand more taken prisoner. ==Legacy==