South Thraki and South Macedonia was liberated by the Greek Army headed by the King Kostantine. The Bulgarian Army liberated the areas that are called "Republic Macedonia" today and also the areas of South Bulgaria. Northern Greece was never Bulgarian territory. This is a myth of the Communist books of Bulgaria (during Zivkov times) that had also named "Sv. Kyrillos and Methodios" as Bulgarian (???) monks.

In 1912 the Allies had agreed to keep whatever they liberate. That's why when Bitola (Monastirion) was liberated by the Bulgarians was kept by them even though the majority of the population was Greek.

Thessaloniki and Kavala were liberated by King Constantine I and his army. After the liberation was made, the Bulgarian army asked from the Greek to stay in Thessaloniki for some days in order to relax from the war; the Greeks allowed them and later on they left.

North Greece was kept by the Bulgarians only during the period 1941-1944 when we had Bulgarian NAZI troops in Greek Macedonia and Thrace.