The technology 'Super Unit Size" can also be understood as 'Combat Group Size" or "Unit Group Size". For example, if your 'Super Unit Size' technology is Level 2, you will be able to drop 2 units at a time during a battle and those 2 units will look like a single unit with 2x on top of its head. When 1 unit from the group is killed, you will see the number on top of the unit group drops from x2 to x1, and when the last unit in a group is killed, the unit group will disappear.