On August 1, 30 BC, Mark Antony committed suicide after the Battle of Alexandria, Egypt. An excerpt from the article:
"Defeat by Octavian and Suicide
By the end of 33 B.C., the Second Triumvirate had ended, as prescribed by law, and tensions between Mark Antony and Octavian had reached a climax. A propaganda war enveloped Rome, with Antony accusing Octavian of being a usurper, forging evidence of his adoption by Caesar and Octavian accusing Antony of low morals for leaving his wife for Cleopatra. The situation escalated into a military war, with the two generals meeting at Actium, Greece, on September 2, 31 B.C. In a confused battle, Antony's fleet was defeated and he fled back to Cleopatra in Egypt. As Octavian's forces entered Alexandria, the distraught Antony committed suicide by his own sword. Cleopatra followed him in death after Octavian's forces had captured Egypt."