this 'division directive' further specified the tasks of three attack groups, the right attack group around 2nd panzer division, central attack group around 1st panzer division and the left attack group around 10th panzer division. it also gave precise timetables for artillery and air support missions and their targeted front sectors over the course of the day. in general, the artillery would shell the immediate river bank up until 16:00, but then move the bombardment further inland as the ground forces cross the river. at 16:00, under cover of the german air support, rifle regiment 1 was the first unit of 1st panzer division to cross the meuse, accompanied by "großdeutschland". the german air support had silenced the french artillery, accelerating the operation.