The Roman Empire, sometimes called the Fifth Roman Empire, is a nation in southern Europe and northern Azania, completely encircling the Mare Nostrum (Mediterranean Sea). Rome is one of the three great powers of the world, with the other two being Vesperia and Mongolia. Rome is the oldest nation in the world, with the first Roman Empire being founded in 25 BC by Augustus after his victory over Marc Antony and Cleopatra in Egypt. His successors expanded the empire to eventually encompass most of Europe and Asia, but Rome experienced its first major crisis in the mid-5th century, which lasted for nearly 60 years until Rome was re-established in 517. However, Rome never recovered from this crisis, as many of its most distant provinces became free and would not firmly return to Roman control for centuries. Rome experienced three more crises and 11 civil wars in its entire history, with the most recent civil war having occurred within the last 100 years. Despite this, Rome continues to be one of the most powerful nations in the world, as well as off-world on the Moon and Venus.