1) _constantly_ letting armour columns run ahead of the logistical support, so they run out of fuel/food. 2) Some evidence of using clear radio communications

1) _constantly_ letting armour columns run ahead of the logistical support, so they run out of fuel/food. 2) Some evidence of using clear radio communications because officers are too far away to be contacted 3) no coordination between air and ground 4) Allowing the column advancing to kiev to bunch up like that.