And when Antipater died, after appointing Polysperchon general-in-chief, and Cassander chiliarch,1 Cassander at once became rebellious, promptly took the government into his own hands, and sent Nicanor with all speed to relieve Menyllus from the command of the garrison at Athens, bidding him take over Munychia before Antipater's death became known. [2] This was done, [...]
Edition :
Plutarch's Lives VIII: Sertorius and Eumenes, Phocion and Cato the Younger, ed. Bernadotte Perrin, Harvard University Press: Cambridge/MA - William Heinemann Ltd.: London 1919 (The Loeb Classical Library 100).
Notes :
After Antipatros' death, Cassander tried to take over the power that was not given to him.