According to Shoigu there are 59,300 Ukrian forces on the LOS.
Previous talk was about 125,000. It now looks like propaganda huffing and puffing. The morale of the Ukr army is in the toilet and
all they have are Nazi militants which engage in terrorism.
My take is the 59,000 are the assault units to break through the lines. The rest of the force is needed to hold the line and pin down the NAF units. Rule of thumb is you need at least a 3 to 1 force advantage to breakthrough defensive lines. Since the planned action apparently call for 2 simultaneous assault and the NAF have 10 units of 3,000 or so covering the front. In those two areas the UAF would have a 10 to 1 advantage and slice through easily to split the Donbas into 3 parts and reach the Russian borders.