So who gets the op both squads are attacking and both have 1 unit in it them who gets the OP?
Actually it depends what kind of unit. You may have one infantry unit and the other guy has 1 tank for example. If they are the same kind of unit then it will come down to exp on the units. If neither unit has exp or the happen to have the same amount of exp then they will both die and no one will capture the op or colony.