Passage: The Syrian Republican Guard (Arabic: الحرس الجمهوري‎ al-Ḥaras al-Jamhūrīy), also known as the Presidential Guard, is an elite 25,000 man mechanized division. Its main purpose is to protect the capital, Damascus, from any foreign or domestic threats. The Guard was the only Syrian military unit allowed within the capital city before the war.

Question: What is the main function of this division?
protect the capital, Damascus