What is the final year of XXX?
Federation of Arab Republics
The Federation of Arab Republics (Arabic: اتحاد الجمهوريات العربية‎ Ittiḥād al-Jumhūrīyāt al-``Arabīyah) was an attempt by Libya's Muammar Gaddafi to merge Libya, Egypt and Syria in order to create a United Arab state. Although approved by a referendum in each country on 1 September 1971, the three countries disagreed on the specific terms of the merger. The federation lasted from 1 January 1972 to 19 November 1977. It is not to be confused with the United Arab Republic (1958--1961), which was a single sovereign state uniting Egypt and Syria.
1977