The Royal Saudi Air Force (Arabic: القوات الجوية الملكية السعودية, al-quwwāt al-ğawwiyyah al-malakiyyah as-suʿūdiyyah), is the aviation branch of the Saudi Arabian armed forces. The RSAF has developed from a largely defensive military force into one with an advanced offensive capability. The RSAF maintains the second largest fleet of F-15s after the USAF.