 The specific naming dispute, although an existing issue in Yugoslav–Greek relations since World War II, was reignited after the breakup of Yugoslavia and the newly gained independence of the former Socialist Republic of Macedonia in 1991.Since then, it was an ongoing issue in bilateral and international relations until it was settled with the Prespa agreement in June 2018, the subsequent ratification by the Macedonian and Greek parliaments in late 2018 and early 2019, and the official renaming of Macedonia to North Macedonia in February 2019.The dispute arose from the ambiguity in nomenclature between the Republic of Macedonia, the adjacent Greek region of Macedonia and the ancient Greek kingdom of Macedon.