This is pay-walled, but here's a summary: The country we now call "Macedonia" (i.e. The Republic of Macedonia) was formed in 1991 after Yugoslavia broke up. Greece didn't like the name, because "Macedonia" was already the name of a large region in Northern Greece. This would be similar to a region of Quebec bordering the US breaking away from Canada and calling itself Maine. Some Greeks apparently felt that the Repub…
There’s a Mexican state named Baja California and a US state named simply California. Exact same thing as this Macedonia business.