Russia's most powerful mercenary said on Sunday that his Wagner fighters would not sign any contract with Defence Minister Sergei Shoigu, publicly refusing an attempt by the defence ministry to bring his fighting force under its sway. -snip- The defence ministry on Saturday said Shoigu had ordered all "volunteer detachments" to sign contracts with his ministry by the end of the month, a step it said would increase the effectiveness of the Russian army. Though the ministry did not mention Wagner in its public statement, the Russian media reported that it was an attempt by Shoigu to bring the mercenaries...