the operation began the following day under french artillery fire, which guderian blames on an action by von kleist and air force general hugo sperrle which had taken away resources from anti-artillery actions. the final operational plan was given out just some seven hours and 45 minutes before the attack was to be carried out, in the form of "korpsbefehl nr. 3." the attack was to be supported by eight hours of aerial bombardment at massive scale before the ground forces' attack, which was to be launched at 16:00 in the afternoon. on the german right, 2nd panzer division was to advance across the meuse river on both sides of donchery and seize the heights on the south bank of the river. in the center, 1st panzer division would cross the river just west of sedan and attack between glaire and torcy. on the left flank, 10th panzer division would cover 1st panzer by securing eastern sedan and moving southeast towards bazeilles and then crossing the river between sedan and bazeilles. the operational plan was further specified at noon, with the "divisionsbefehl nr. 5".