Complex sentence: Some groups in the FSA have been cooperating with the YPG to battle ISIL under the name of the Euphrates Volcano and the Syrian Democratic Forces, although many others are currently in conflict with the YPG.
Split into simpler sentences: Some groups in the FSA have been cooperating with the YPG to battle ISIL under the name of the Euphrates Volcano and the Syrian Democratic Forces. Although many others are currently in conflict with the YPG.