Wagner boss Yevgeny Prigozhin's unexpected offensive into the Russian interior may breathe new life into the counteroffensive across the border in Ukraine.
The big picture: Ukraine's forces have made only gradual progress so far in attacking well-defended Russian positions in the south and east of Ukraine. Wagner mercenaries, meanwhile, took control of the major Russian city of Rostov-on-Don and seemed to face little resistance as they covered three-quarters of the roughly 600 miles from there to Moscow.
