We ruled that the unit had to be within 3 inches of the pad to be taken away. I was playing my wolves. The imperial side included my wolves, the Salamanders across from me, and the raven guard to my direct left. The traitors ended up including the iron warriors (across and to the right) , Khorne, (across and to the left), and Imperial Fists(to my direct right). We ended Imperial 25 to traitor 22.