The Calvary of Serbia (1932)
Still regarded as the best Serbian documentary film account of WW1 ever, it gathers all the available footage of Serbia's army, its battles on the home ground, its refuge on the island of Corfu, its victorious offensive on the Thessaloniki Front and the return to the homeland. The original documentary footage from 1915–1918 was somewhat supplemented in a small measure with some staged reenactments of Serbian army retreating over Albania, and later liberation of Belgrade. The first version of this documentary epic was shown in 1930 under the title "For the Honour of Homeland". Andrija Glisic and Zarija Djokic later made a new sound version of the previous silent movie and renamed it "Fire Over the Balkans".
