From the Document: "Over the last decade, Russian private military companies (PMCs) have appeared globally in various conflicts. Observers believe the Russian government is increasingly using PMCs to project power cheaply and deniably. Russian PMCs often operate alongside local militias, volunteers, criminal groups, and other non-state actors. In many cases, such PMCs appear closely connected to and controlled by the Russian government; in other cases, the extent of government control is uncertain. Members of Congress may be interested in examining the scope of Russian PMC operations to understand the full range of Russian tactics and operations when evaluating Russia's efforts to advance its foreign policy."
CRS In Focus, IF11650
Congressional Research Service: https://crsreports.congress.gov/