Two nations that fought on the side of Russia and Serbia in WWII were France and Britain.
Which nations fought on the side of Russia and Serbia?
The French were allied to Russia so when war broke out and saw Russia and Serbia fighting against Germany and Austria-Hungary, France joined the Russians and Serbians.
Britain was allied with France and so joined the war on the side of the French.
Find out more on World War I at https://brainly.com/question/14345035.
