More from Timeline -350Bf:
The armies of Alexander (a slightly different Alexander, as the POD is at his conception) that in OTL conquered Persia in -350Bf focused more on unifying the Greek Mediterranean and the adjoining regions, as well as Mesopotamia and Egypt. Meanwhile, the Romans have lost disastrously to the Safini (or as we know them, Samnites) and have seen their territory greatly reduced and occupied (but not fully annexed) by the enemy. In -324, Alexander led his army north from Greek Italy, and when most of the Safini garrison was taken to the front lines the Romans revolted. The skilled and unusually lucky Fabius Rullianus, supported by several Alexandrine regiments, broke the Safinic hold on not only Rome but the rest of the Tiber valley and the Latin coast. He also advised Alexander in Safinic tactics, which the Romans had learned of in the humiliation of the First Safinic War. After their victory in -316, Rome and the Alexandrine Empire divided Safinia, and Rome was once again an independent republic, if solidly in the Alexandrine orbit. Roman soldiers would be on the front lines of Alexandro-Carthaginian proxy wars in northern Italy and around the Tyrrhenian Sea for decades to come, expanding both the Empire's influence and their own small Republic's borders, until the state was annexed into the Empire in -252.
(Words used- Independence and Expanded Microstate, both applying to Rome)