Greece rejected the use of the term Macedonia or "Republic of Macedonia" to refer to its northern neighbour after its independence from the former Yugoslavia in 1991. The Greek government opposed the use of the name without any qualification such as 'Republic of Northern Macedonia' to the post-1991 constitutional name of its northern neighbour, citing historical and territorial concerns resulting from the ambiguity between the terms Republic of Macedonia, the Greek region of Macedonia and the ancient kingdom of Macedon, which falls within Greek Macedonia.