If by Macedonia one considers the conquest of the area of ancient Paionia (i.e. the FYROM), following the same logic one has to consider Afghanistan as being Macedonia, as well. Macedonia is considered only the region that at the ancient times was inhabited by the Macedonian Greeks. Conquests are temporary; they do not count.
>> FIRST ASSUMPTION: the Existence of the "Macedonian" People in 1913
One of the main cries of the FYROM Slavs is that Greece denies the existence of the "Macedonian" people. The FYROM historians claim that the "Macedonians" are the ones who created the Ilinden Uprising, but as we saw above, the insurgents were Bulgarians living in geographic Macedonia. Not one of them was ethnic "Macedonian." The FYROM Slavs further state that the Carnegie report uses the term "Macedonian" in an ethnic sense.
>> SECOND ASSUMPTION: The Treaty split Macedonian Territories in 1913
The area of Macedonia would have been "51.56% to Greece, 38.32% to Serbia, 10.12% to Bulgaria" if Macedonia included the FYROM areas north of Gradsko and Bakarno Gumno - Krushevo. Nevertheless, that is not the case.
Dr. Fanula Papazoglu stated that Macedonia's territory reached as north as the area of Bakarno Gumno in the towns of Krushevo and Prilep, which means that the areas north of Gradsko were not included in Macedonia even in modern times. If the whole area of the FYROM was within Macedonia in 1913 when the Treaty of Bucharest was signed, is it not interesting that the borders were moved in 1917 and later by 100 kilometers to the south? Taking into consideration the above, one could argue that the division was more or less 70% to Greece, 11 % to Bulgaria, and 16% to Serbia and a strip of 3% to Albania." The Academy of Athens elevates the territories of the Macedonian Homeland belonging presently to Greece to 90%.
In the same interview, Fanula Dimitriou-Papazoglou told the author that before WWII Skopje was an Old Serbian town and the Capital of the pre-War Vardarska Banovina. She also stated that the only reason for it being the capital of the newly emerged People's Republic of Macedonia was that it was the largest city in the area. Bitola was too small.
>> THIRD ASSUMPTION: The Treaty of Bucharest has an expiry
The FYROM Slavs created this assumption for internal consumption starting with the misinterpretation of President Gligorov's statement requesting the revision of the Treaty of Bucharest, but externally it indicates ignorance because treaties setting borders are permanent. The only treaties that include in their text an expiry are treaties of leasing with a usual clause of 99 years.
In order for the treaty of Bucharest to be officially re-visited, it would require all signatory countries to exclusively agree to it, something that would be nearly impossible since many countries' national interests and their stability would be directly or indirectly affected. Since this Treaty is one of the fundamental treaties that set some of the borders in the Balkans, a revision or re-negotiation of the treaty would set a chain reaction that would invalidate or alter successive treaties. In the end, the opening and renegotiation of the treaty would not guarantee that the FYROM would gain territories, nor would it guarantee the FYROM's own existence.