There is a French War Cemetery in the photo. The cemetery is related to the first world war. It is located in There is a Serbian military cemetery in the photo. Serbian soldiers from the First World War and the First Balkan War are buried at the cemetery. There are 1 321 metal crosses placed at the cemetery, but the deceased bodied are buried under the central monument. Building the cemetery began in 1926.
Bulgaria joined in the war on the side of Austria-Hungary and Germany. Their main reason was to gain the territory of Vardar Macedonia. Austria-Hungary and Germany promised them to give it if Bulgaria joined the war on their side.
What was the name of the first world war before the second world war? The Great war. There are still memorials in England nowadays.