4. TERMS OF THE BULGAR-SERBIAN TREATY. (1912)
There are two parts to the Bulgar-Serbian treaty. One part created a defensive alliance between the contracting parties, in which they pledged themselves to "succor one another with their entire forces in the event of one of them being attacked by one or more States."
The other part is the "secret annex," in which they provided for possible war against Turkey, in the event of internal or external troubles of Turkey which might endanger the national interests of either of the contracting parties or threaten the maintenance of the status quo in the Balkan peninsula. The important feature of this part is the agreement as to territorial divisions in the event of a victorious outcome of such a war. All lands were to be held in common until after the signing of peace.
Following peace, territory north of the Shar Range, including the Sandjak of Novi Bazar and "Old Serbia," were to go to Serbia, and the territory south and east of the Rhodope Range and the Struma River to Bulgaria.
Autonomy was to be given to the intermediate region (South of Shar Range, East of Rhodope, North of Aegean). This region is Macedonia.
If, however, BOTH parties should agree that autonomy for this region was not feasible,
it was to be divided between them according to lines defined in the treaty, with the exception of a further intermediate region left undivided and to be subsequently apportioned through arbitration by the Czar of Russia. The territorial arrangements represent an attempt to reconcile the Serbian desire for partitions and access to the Adriatic with the Bulgarian plan for Macedonian autonomy. Finally the treaty provided that the Czar should be arbitrator in other questions that might arise from the treaty.