Meleager and the infantry supported the candidacy of Alexander's half-brother, Philip Arrhidaeus, while <answer>Perdiccas</answer>, the leading cavalry commander, supported waiting until the birth of Alexander's unborn child by Roxana. After the infantry stormed the palace of Babylon, a compromise was arranged – Arrhidaeus (as Philip III) should become king, and should rule jointly with Roxana's child, assuming that it was a boy (as it was, becoming Alexander IV). <answer>Perdiccas</answer> himself would become regent (epimeletes) of the empire, and Meleager his lieutenant. Soon, however, <answer>Perdiccas</answer> had Meleager and the other infantry leaders murdered, and assumed full control. The generals who had supported <answer>Perdiccas</answer> were rewarded in the partition of Babylon by becoming satraps of the various parts of the empire, but <answer>Perdiccas</answer>' position was shaky, because, as Arrian writes, "everyone was suspicious of him, and he of them".
Who was the leading calvary commander?
Perdiccas