Yevgeny Prigozhin, the chief of Russia’s Wagner mercenary group, on Thursday accused regular Russian army units of pulling back 570 meters north of the eastern Ukrainian city of Bakhmut, leaving his own fighters’ flanks exposed. -snip- Prigozhin, who has repeatedly accused Russia’s top military brass of not doing enough to back his men, asked the defense ministry to do all it could to protect Bakhmut’s flanks after what he alleged was a withdrawal. “Unfortunately, units of the Russian defense ministry have withdrawn up to 570 meters to the north of Bakhmut, exposing our flanks,” Prigozhin said in a voice message....