As Russian troops wage a ferocious house-to-house fight for control of strongholds in eastern Ukraine, a parallel battle is unfolding in the top echelons of military power in Moscow, with President Vladimir Putin reshuffling his top generals while rival camps try to win his favor. The fighting for the salt mining town of Soledar and the nearby city of Bakhmut has highlighted a bitter rift between the Russian Defense Ministry leadership and Yevgeny Prigozhin, a rogue millionaire whose private military force known as the Wagner Group has played an increasingly visible role in Ukraine. Putin's shakeup of the military brass this week was seen as a bid to show that the Defense Ministry still has his support and is in charge as the troubled conflict nears the 11-month mark.