ISIS or Assad win then they are war guns vs rebells in final fight. U.S. UK and France supporting rebells. But don't know which of ISIS or Assad win the first war of wars then the kampf against rebells begin. Thinking rebells are strong even they is smaller armies than ISIS and Assad.
Maybe ISIS have lose 40 Tousand warriors since 2013 as maximum strenght off losers last 2 years. Assad have lose 60 Tousand soldiers of Assads Army maximum strenght by losers in Syria regim's. Rebells are strongest last 2 or 3 years.
Assad need Russia or Iran invasion vs ISIS to win the first war ??