Iron Curtain
Bulgaria

The Yugoslav-Bulgarian border became closed in 1948 after the Tito–Stalin split. The area around the border was restructured, with land ownership on both sides no longer legal. Loudspeakers were installed for spreading propaganda and insults. The installations were not as impressive as the one on for example the inner-German border, but they resembled the same system. In the GDR, there was a long time rumor that the border of Bulgaria was easier to cross than the inner German border for escaping the East Bloc.

In Greece, a highly militarized area called the "Επιτηρούμενη Ζώνη" ("Surveillance Area") was created by the Greek Army along the Greek-Bulgarian border, subject to significant security-related regulations and restrictions. Inhabitants within this 25 kilometres (16 mi) wide strip of land were forbidden to drive cars, own land bigger than 60 square metres (650 sq ft), and had to travel within the area with a special passport issued by Greek military authorities. Additionally, the Greek state used this area to encapsulate and monitor a non-Greek ethnic minority, the Pomaks, a Muslim and Bulgarian-speaking minority which was regarded as hostile to the interests of the Greek state during the Cold War because of its familiarity with their fellow Pomaks living on the other side of the Iron Curtain.

The border was dismantled at the end of the 1990s.
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