User: Summarize Romania's history and founding.
Assistant: Romania began as Dacia and then was conquered by the Roman Empire in late antiquity. Modern Romania formed in 1859. After World War I because they joined the Allies Romania gained extra territories and the Kingdom of Romania formed. In World War II Romania was forced to cede some of it's areas. Following that Romania became a socialist republic until the 1989 Revolution when it transitioned to democracy.