This plan was carried out in its broad outlines. The Battle of Wörth was brought on prematurely, and therefore led, not to the capture of MacMahon's army, which was intended, but only to its defeat and hasty retreat as far as Châlons. The Battle of Spicheren was not intended by Moltke, who wished to keep Bazaine's army on the Saar until he could attack it with the second army in front and the first army on its left flank. But these unexpected victories did not disconcert Moltke, who carried out his intended advance to Pont-Mousson, crossed the Moselle with the first and second armies, then faced north and wheeled round, so that the effect of the battle of Gravelotte was to drive Bazaine into the fortress of Metz and cut him off from Paris.