Remember last Euro when all the fans were mixed together? There were tons of gang fights between all the fans throwing bottles and patio furniture at each other on a daily basis. The Russian ultras in particular targeted the English fans full out mob attacking them in the stadium and the streets. They literally have training camps out in the woods where all they do is work out and MMA spar against each other. The English hooligans who are basically just a bunch of drunks didnt stand a chance against them.