 On 18 November, Pichegru began a series of attacks on Wurmser's defensive lines in the Battle of Haguenau.The French government reinforced the "Army of the Moselle" with 15,000 troops taken from the "Army of the Rhine" and 5,000 from the "Army of the Ardennes".Both Hoche and Pichegru were well aware that the main objective was the relief of Landau.