Following the death of Alexander, Arcesilaus was allotted Mesopotamia in the Partition of Babylon in 323 BCE, which he may have administered since as early as 331 BCE.[1] He supported Perdiccas, and may have been deposed or forced to flee his satrapy for this reason.[1] Nothing concrete is known about him after 323 BCE, but it is also believed that he may have been an opponent of Seleucus.[2] In any case, by the Partition of Triparadisus in 320 BCE, Arcesilaus had fallen from influence, as he was replaced in his satrapy by Amphimachus.[1]