Second War of the Diadochi
The Second War of the Diadochi was the conflict between the coalition of Polyperchon ( as Regent of the Empire ) , Olympias and Eumenes and the coalition of Cassander , Antigonus , Ptolemy and Lysimachus following the death of Cassander's father , Antipater ( the old Regent ) . 
<triplet> Cassander <subj> Antipater <obj> father