After Perdiccas' death at the Nile, the remaining Successors met to divide the empire once more. At Triparadisus in 321 BCE Antipater was made the new Regent. Perdiccan loyalists were cut out of the agreement entirely and became rebels against the regent overnight. Antigonus was put in charge to root out these rebels as Strategos of Asia. At the command of the Royal Army, Antigonus marched into Asia and forced Eumenes of Cardia to withdraw into a mountain fortress and out of the political game.
Eumenes of Cardia was not the only remaining Perdiccan loyalist though. There was a group of Perdiccas' relatives and hold-outs. They gathered an army of their own and prepared to face Antigonus at a pass near Kretopolis in Asia-Minor. They had recruited a phalanx, peltasts, cavalry; a true Macedonian style combined arms force.
Antigonus Monopthalamos left the siege of Eumenes and force marched his troops 300+ miles to get the drop on the Perdiccans. This caught the 4 loyalist generals by surprise and they rushed to rally their troops. A battle between the Royalists and the Perdiccan rebels ensued for control of Asia Minor.
Again, we know very little of each army, except the following. 1 Perdiccan General was busy raising and forming the Phalanx units. A second one led the Peltasts and Cavalry in a delaying attack on Antigonus' troops. Meanwhile, Antigonus also had a strong cavalry component to his army. There was also a reference to the trumpeting of Antigonus' elephants. Otherwise, we will use the Minor Successor list for the Perdiccan Loyalists Line of Battle and the Antigonus list from the rules for his forces.