Comments by "" (@VersusARCH) on "Reporters: How the Salonica Front led to victory in WWI" video.

French helped with the breakthrough (French 122 and 17th colonial division bore the brunt of the actual breakthrough as well as French artillery) and they also supplied the Serbian Army. The French air force won the air superiority over the front too. Other allies helped as well. It was a joint effort, although the exploitation part of the breakthrough was indeed mostly performed by the Serbian Army.
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One of the 6 infantry divisions of the Serbian army in 1918. was named the Yugoslav Division. It comprised largely of the ex-Austro-Hungarian POWs (taken by Russians) of South Slavic ethnicity that expressed desire to fight for Serbia and Yugoslavia. There was enough of them initially to form an entire corps of 2 divisions in Romania that saw action there. Once the revolution in Russia began many of them managed to travel to Salonika (via Trans-Siberian railway, Vladivostok and sea) and were organized into the Yugoslav division. Supplanting them were also ethnic South Slav (mostly Serb) volunteers from the USA which answered the call of the Serbian government in exile.
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@salonez91 That was in 1916. and it was called the Serbian Volutnteer Corps (comprising of 2 divisions). By 1917. Russia and Romania were out of the war and of the survivors who made it to Salonika + addittional Yugoslav (mostly Serbian) volunteers mostly from USA only one Yugoslav division was formed at the Macedonian front.
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@aleksk4151 Likewise Bulgaria on its own would not be able to occupy Serbia. While stronger, the disparity in strength was not big enough for Bulgaria to pull it off.
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