After six hours, the aircraft on low patrol were to range further east to attack troop concentrations. Aircraft from the corps and army wings were to attack all targets found west of Staden–Dadizeele, with the Ninth (Headquarters) Wing taking over east of the line. German aerodromes were attacked periodically and special "ground patrols" were mounted below over the front line, to defend the corps artillery-observation machines. Attempts to co-ordinate air and ground attacks had mixed results; on the II Corps front, few air attacks were co-ordinated with the infantry and only a vague report was received from an aircraft about a German counter-attack, which was further obscured by a smoke-screen. On the XIX Corps front, despite "ideal" visibility, no warning by aircraft was given of a German counter-attack over the Zonnebeke–St Julien spur at which was also screened by smoke shell. To the north on the XVIII and XIV Corps fronts, the air effort had more effect, with German strong-points and infantry being attacked on and behind the front. Air operations continued during the night, with more attacks on German airfields and rail junctions.