 Bessus was unable to mount a successful resistance to the growing military might of Alexander's army so he fled to his native Bactria, where he attempted to rally local tribes to his side but was instead turned over to Alexander who proceeded to have him tortured and executed for having committed regicide.Moving thousands of kilometers eastward from recently subdued Persia, the Macedonian leader Alexander the Great, encountered fierce resistance from the local tribes of Aria (satrapy), Drangiana, Arachosia (South and Eastern Afghanistan, North-West Pakistan) and Bactria (North and Central Afghanistan).Upon Alexander's death in 323 BC, his empire, which had never been politically consolidated, broke apart as his companions began to divide it amongst themselves.