In the Liberators' civil war of 43–42 BC, Cleopatra sided with the Roman Second Triumvirate formed by Caesar's grandnephew and heir Octavian, Mark Antony, and Marcus Aemilius Lepidus. After their meeting at Tarsos in 41 BC, the queen had an affair with Antony. He carried out the execution of Arsinoe at her request, and became increasingly reliant on Cleopatra for both funding and military aid during his invasions of the Parthian Empire and the Kingdom of Armenia. The Donations of Alexandria declared their children Alexander Helios, Cleopatra Selene II, and Ptolemy Philadelphus rulers over various erstwhile territories under Antony's triumviral authority. This event, their marriage, and Antony's divorce of Octavian's sister Octavia Minor led to the Final War of the Roman Republic. Octavian engaged in a war of propaganda, forced Antony's allies in the Roman Senate to flee Rome in 32 BC, and declared war on Cleopatra. After defeating Antony and Cleopatra's naval fleet at the 31 BC Battle of Actium, Octavian's forces invaded Egypt in 30 BC and defeated Antony, leading to Antony's suicide. When Cleopatra learned that Octavian planned to bring her to his Roman triumphal procession, she killed herself by poisoning, contrary to the popular belief that she was bitten by an asp.