To what iraqi city, where international forces have been battling isis since october, are hundreds of additional u. s. troops being deployed?

~Hello there! ^_^

Your question: To what Iraqi city, where international forces have been battling ISIS since October, are hundreds of additional u.s. troops being deployed..?

Your  Mosul is the Iraqi city, where international forces have been battling ISIS since October, are hundreds of additional u.s. troops being deployed.

Hope this helps! :D