Marcus Antonius, also known as Mark Antony, was a Roman politician and general who lived from 83 BC to 30 BC. He was an ally of Julius Caesar and served as one of his generals during the Gallic Wars. After Caesar's assassination, he formed the Second Triumvirate with Octavian and Lepidus, and later became the lover of Cleopatra, Queen of Egypt. He is best known for his defeat at the Battle of Actium in 31 BC, which marked the end of the Roman Republic.