The Institute for the Study of War published on 31 March 2022 an analysis titled "Russia Mobilizes Reinforcements from Syria and Africa to Ukraine" by Jennifer Cafarella, Ezgi Yazici, and Zach Coles.
The paper argues that Russia is attempting to redeploy Syrian units with experience working under Russian commanders to Ukraine to mitigate high Russian casualties. The report provides little evidence that Russia has sent Wagner Group mercenaries from Africa to Ukraine.