on the 14th, the bulk of the heavy detachments of xix army corps began crossing the meuse river under the cover of the infantry and recon units holding the bridgeheads. 1st panzer division broke through to chémery-sur-bar in the early morning of may 14. xix army corps took thousands of allied soldiers pow in the process. here, while holding a victory parade, 1st panzer division came under fire by friendly luftwaffe pilots, who bombarded the german infantry in a friendly fire incident, causing several fatalities. when informed of a possible french counterattack with heavy tanks, guderian accelerated the river crossing by xix army corps' own tanks. 1st panzer division, including both 1st and 2nd panzer brigades, crossed near floing and made an attack towards the stonne heights, whereas 2nd panzer division crossed at donchery.