It's Ukraine. The French troops wouldn't be that motivated to fight in a war that they had nothing to do with in the first place.
Russia trains soldiers for 5-6 months, every July and January they train 250-300k. In January 24 they minted 277,000. 250,000 slated for Ukraine in August. In July Russia will have drone superiority and Ukrainian Drone Commander stated these drones will destroy Ukrainian soldiers without losses of Russian troops.
By October Russia will have routed Ukraine.