https://en.wikipedia.org/wiki/Battle_of_Khasham
https://www.nytimes.com/2018/02/13/world/europe/russia-syria-dead.html
https://www.nytimes.com/2018/05/24/world/middleeast/american-commandos-russian-mercenaries-syria.html
https://www.independent.co.uk/news/world/battle-syria-us-russian-mercenaries-commandos-islamic-state-a8370781.html
https://www.aerotime.aero/articles/wagner-publishes-details-on-us-air-strikes-during-battle-of-khasham