The experience of one of Russia's most prestigious airborne regiments highlights the "extreme attrition and high turnover" rates in Russia's deployed military, including its senior ranks, the British Defense Ministry said Saturday in its daily intelligence update on the Russian invasion of Ukraine.Three successive commanders of the 247th Guards Air Assault Landing Regiment have either resigned or been killed, it said. First, Colonel Konstantin Zizevsky, a unit commander, was killed near the beginning of the Russian invasion. Then, Colonel Vasily Popov was "likely killed" in the "heavily contested Orikhiv sector," early this month, according to the intelligence report.Meanwhile, Colonel Pytor Popov "likely resigned" his command of the 247th in August, the report said, after protesting the military's failure to recover the bodies of Russian casualties.Ukraine claimed responsibility for a missile attack Friday on the headquarters of Russia's navy in Crimea, delivering a major blow for Mos