Cleitus, the son of the notable Illyrian King Bardylis, emerged as a significant figure in the tumultuous landscape of ancient Illyria. As a monarch, he inherited not only a legacy of leadership but also the challenges that came with it. His reign was marked by strategic brilliance, particularly during the Illyrian Revolt of three hundred thirty-five BC, where he showcased his capabilities as a military strategist.
In a bold move, Cleitus forged alliances with neighboring states, notably the Taulantii under Glaucias and the Autariatae led by Pleurias. This collaboration was pivotal in his efforts to strengthen Illyrian resistance against external threats. Cleitus successfully captured and fortified the city of Pelion, preparing for the arrival of Glaucias' forces to bolster his position.
However, the tides of war shifted when Alexander the Great intervened, arriving before Glaucias could lend support. Alexander's tactical prowess led to a blockade of Cleitus within Pelion, forcing him into a precarious situation. Despite the odds, Glaucias managed to assist Cleitus, leading to a temporary retreat of the Macedonian forces.
After a brief truce, Alexander launched a surprise attack on the Taulantii camp, catching the Illyrians off guard. In the chaos, Cleitus managed to escape, preserving his rule, albeit likely as a vassal under the expanding Macedonian Kingdom. His reign over the southern Illyrians, centered in Dassaretis, continued amidst the shifting power dynamics of the region.