The Syrian campaign has provided the clearest example of how it works so far. There are the official Russian forces, which have already celebrated victory and boasted about the combat experience they have gained. Their goal was to save Assad's regime while losing as few Russian military lives as possible (only 44 Russian service members have been reported dead), establish an increased presence for Russia in the Middle East, and make the country an official go-to force in resolving the region's many crises.
And then there's Wagner Private Military Company, an outfit based in southern Russia that hires able-bodied men, often ex-soldiers, as deniable boots on the ground for a salary that often exceeds what regular soldiers are paid but without the state-of-the-art equipment and official state support that regulars enjoy. The pay may come from the Russian government, but also from side projects, like taking over oil installations for Assad. [...]
overlap between Russian regulars and irregulars. The Kremlin has clear geopolitical interests in the area -- the destabilization of Ukraine -- but it can't be discussed openly. President Vladimir Putin was cagey in his only comment on the matter, which came in a 2015 press conference. "We have never said that there are no people there who are involved in resolving certain issues, including in the military sphere, but that doesn't mean regular troops are present there," he said. Russia has never confirmed sending regular units in key moments of the east Ukraine war, though those operations are well-documented. Also present are Wagner and local irregulars, who fight out of nationalist convictions on one level and a share of the region's mining wealth on another.