Year 328 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Proculus and Scapula or Decianus and Barbatus (or, less frequently, year 426 Ab urbe condita). The denomination 328 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
At Maracanda, Alexander murders Cleitus, one of his most trusted commanders, friend and foster-brother, in a drunken quarrel; but his excessive display of remorse leads the army to pass a decree convicting Cleitus posthumously of treason.
Understanding now the danger represented by his enemy, Alexander moves personally to relieve Maracanda, only to learn that Spitamenes has left Sogdiana. Spitamenes then attacks Bactra, from where he is repulsed with great difficulty by the satrap of Bactria, Artabazus of Phrygia.
Alexander attacks Oxyartes and the remaining Bactrian barons who are holding out in the hills of Paraetacene (modern Tajikistan). The Macedonians seize the crag on which Oxyartes has his stronghold (the Sogdian Rock), and among the captives is his daughter, Roxana. In the reconciliation that follows the battle, Alexander marries Roxana. The rest of Oxyartes' opponents are either won over or crushed.
December – Spitamenes is badly defeated by Alexander's general Coenus. At this point Spitamenes' allies, feeling the situation desperate, kill their leader and send his head as a gift to Alexander.