German cavalry of HKK 4 operating to the north of the 6th Army had probed north west as far as Ypres and towards Estaires in the Lys valley and then retired south across the Lys near Armenti res and moved south west through Bailleul and Fr linghien to Laventie The 3rd cavalry Division found the road to Estaires blocked and 6th Cavalry Division moved through De lemont and Radinghem en Weppes Radinghem to Pr mesques and Fleurbaix A skirmish occurred with French Chasseurs but reinforcements arrived to drive them off and reservists were captured The moves of the German cavalry united the divisions of HKK 4 with HKK 1 and HKK 2 but with so ittle room for maneuvre HKK 4 was sent north of the Lys on 11 October