https://www.cbsnews.com/news/russia-vladimir-putin-yevgeny-prigozhin-wagner-group-attack-us-allies-syria/ He's the same guy who just got indicted for elections meddling. I hope shooting at US allies and US special forces is enough to show these guys are not your friends. Also, "oligarch close to Kremlin" is redundant expression. Russian "oligarch" is essentially a feudal title bestowed by Kremlin; you don't get to acquire or keep your fortune without express Putin consent. One more thing: "Internet Research Agency" trolls, and "Wagner Group" mercenaries, are scum of the earth. Thanks to US military to blow some of these guys up in Syria.
The final battle for Syria has begun https://www.thedailybeast.com/the-final-battle-for-syria-has-begun