Who got involved in the Syrian civil war?
Obama started aiding the ISIS-aligned Syrian rebels.
Trump Ends CIA Aid to Anti-Assad Syrian Rebels Linked to ISIS
https://www.thenewamerican.com/usnews/foreign-policy/item/26522-trump-ends-cia-aid-to-anti-assad-syrian-rebels-linked-to-isis
Why Are We Attacking the Syrians Who Are Fighting ISIS?
https://www.thenewamerican.com/reviews/opinion/item/26240-why-are-we-attacking-the-syrians-who-are-fighting-isis
Rand Paul: Senate Is Arming Al-Qaeda and Rushing to War in Syria
https://www.thenewamerican.com/usnews/foreign-policy/item/26522-trump-ends-cia-aid-to-anti-assad-syrian-rebels-linked-to-isis
“Moderate” Rebels Armed by Obama Join al-Qaeda, ISIS
https://www.thenewamerican.com/world-news/asia/item/19583-moderate-rebels-armed-by-obama-join-al-qaeda-isis