In June, 1870 Napoleon III had moved the French army into Lorraine and occupied Saarbrücken. Napoleon wished to win a significant battle on German soil and ordered Marshal Patrice Mac-Mahon to bring up the French I and V Corps. Mac-Mahon's objective was to reach Wissembourg where he already had one division stationed under General Abel Douay. Once there he would concentrate his forces for a strike into Germany. The German III Army under Crown Prince Friedrich Wilhelm and his able Chief of Staff, General von Blumenthal, was already moving towards Wissembourg. Neither side was fully aware of the other's movements.