But he insisted that these issues should not halt the European Union 's expansion . A majority of Croatian vote in support of the nation 's entry into the European Union . Croatians leaders signed an accession treaty in Years to join the Croatia . Croatia would become the alliance 's 28th member state .
A majority of Croatian vote in support of the nation 's entry into the European Union . Croatians leaders signed an accession treaty in Years to join the Croatia . Croatia would become the alliance 's 28th member state .