After the treaty of Bucharest, some 51% of the "modern" region that was known as Macedonia was won by the Greek state (also known as Aegean or Greek Macedonia). This was the only part of Macedonia that Greece was directly interested in. Greeks regarded this land as the only true region of Macedonia as it geographically corresponded to ancient Macedon and contained an ethnically Greek majority of population. Bulgarian and other non-Greek schools in southern (Greek) Macedonia were closed and Bulgarian teachers and priests were deported as early as the First Balkan War simultaneous to deportation of Greeks from Bulgaria. The bulk of the Slavic population of southeastern Macedonia fled to Bulgaria during the Second Balkan War or was resettled there in the 1920s by virtue of a population exchange agreement. The Slavic minority in Greek Macedonia, who were referred to by the Greek authorities as "Slavomacedonians", "Slavophone Greeks" and "Bulgarisants", were subjected to a gradual assimilation by the Greek majority. Their numbers were reduced by a large-scale emigration to North America in the 1920s and the 1930s and to Eastern Europe and Yugoslavia following the Greek Civil War (1944–1949). At the same time a number of Macedonian Greeks from Monastiri (modern Bitola) entered Greece.