Yes, there were wars before WW1. But those were not WW1 and you cant say “WW1 was free for all among Empires” based on events that were not WW1. WW1 was not “free for all”, there were clear alliances that held all war long. Your claim is bullshit and you should correct it.
I am not aware of any inner-alliance battles fought during WW1. And I don’t think there were any. But if you know more than that and can provide sources, please, I am always interested in learning new things.
Nope, not really. In WW1 there were two main coalitions, the Central Powers (the German Empire, the Austro-Hungarian Empire, the Ottoman Empire and the Kingdom of Bulgaria) on one side and the Triple Entente (French Third Republic, the United Kingdom and the Russian Empire) on the other.
WW1 was a world war mostly due to those nations being colonial powers (including the British Dominions (Commonwealth) for simplicity).
Some “associated powers” joined the Entente (a name that was replaced by the term Allied Powers over time) with the beginning of the war, shortly after and in general over the course of the war (most notably the USA in 1917), and the Russian Empire left in 1917 (due to some revolution stuff, but different chapter and they did not “change sides” or something) but the only nation that actually changed sides during the war was the Kingdom of Italy that after not participating initially joined the Allies in 1915 (they were part of a Triple Alliance with the German Empire and the Austro-Hungarian Empire before the war).
So no, it was not “free for all Empire vs Empire” in WW1, it was two very stable military alliances against each other whose members controlled most of the globe at that time.
Don’t get sassy. Just correct your original comment.