It was a shocking provocation in a country where Russian President Vladimir Putin holds a firm grip on power: a convoy of militarized mercenaries advancing on the capital Moscow calling for the resignation of top defense officials.
The weekend march by the Wagner Group ended before a possible confrontation with Russian forces. But experts say it revealed weaknesses in Putin's regime and raised questions about the fate of the private military company that has been key to some of Russia's successes in conflict zones across the globe.
