1st and 2nd panzer divisions were to turn to their right after crossing the river to cross the vital ardennes canal. as most of the french units, although in retreat, were still on the eastern bank of the canal, this would mark xix army corps' total breakthrough through the french army's line. xix army corps operated in tight cooperation with xli army corps under the leadership of georg-hans reinhardt, which had also forced its own initial meuse crossing on 13 may. both units reached the ardennes canal by evening, and 1st panzer division had mostly crossed it by nightfall, attacking singly and vendresse. 10th panzer division and "großdeutschland" were tasked with attacking and then holding the stonne heights. hermann balck also reported in a 1979 interview that after the sedan breakthrough, a meeting between regimental and brigade commanders of 1st panzer brigade fell under friendly fire by luftwaffe pilots, causing several fatalities. balck himself was still en route to the meeting. while balck reports that "an armored brigade commander and two regimental commanders have been killed", it is unclear what incident he refers to. at 21:00 in the evening, the corps leadership gave out "korpsbefehl nr. 5" to determine the operations for the following day. the 2nd panzer division on the left was instructed to advance over boulzicourt, the 1st panzer division was to capture singly, and the 10th panzer division, supported by "großdeutschland", would support and defend the corps' southern flank.