[3] When the military actions between Serbia, Greece, Montenegro and Romania against Bulgaria were in full progress, the Ottoman Empire took advantage of the situation to recover some of its former possessions in Thrace including Adrianople.
Because the Bulgarian troops had all been allocated to the front with Serbia and Greece, the Ottoman armies suffered no combat casualties and moved northwards and westwards without battles.
Shortly after the end of the hostilities, the author interviewed hundreds of refugees from these regions, travelled himself in the places where these tragic events happened and systematically depicted in detail the atrocities, committed by the Young Turks' regular army, Ottoman paramilitary forces and partly by local Greeks.
According to Carnegie Commission 15,960 Bulgarians were "either killed, burned in the houses or scattered among the mountains" and several thousands more were massacred in Western Thrace within this period.
A number of them during this period after the exchange agreements between the Kingdom of Bulgaria and Ottoman Empire after the Second Balkan War left while there were still 6,587 Bulgarians in Marmara Region.