The Roman Empire was the post-Republican phase of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean. The term is used to describe the Roman state during and after the time of the first emperor, Augustus. The 500-year-old Roman Republic, which preceded it, had been weakened by several civil wars. Several events are commonly proposed to mark the transition from Republic to Empire, including Julius Caesar's appointment as perpetual dictator (44 BC), the victory of Octavian at the Battle of Actium (2 September 31 BC), and the Roman Senate's granting to Octavian the honorific Augustus (16 January 27 BC).