Tens of thousands are still fleeing this ancient part of the world.
Syria is a country of mountains, deserts and fertile plains, bordering Lebanon, the Mediterranean Sea, Iraq, Turkey, Jordan, and Israel. The country is largely populated by Sunni Muslims, but is also home to many other ethnic and religious groups: Arabs, Greeks, Armenians, Assyrians, Kurds, and Circassians, Christians, Shiites, Alawites, Druze, Mandeans, Salafis, and Yazidis.
The war in Syria has killed over 250,000 people and displaced over 12 million. Just today, tens of thousands are reported to be fleeing Aleppo with just the clothes on their backs, due to a government offensive on rebel-held areas south of the city.
Although it began as a civil war, it has become much more and divided much of the Middle East, drawing in the United States and Russia. To better understand how Syria arrived to where it is today, Vox put together this simple video.