Shortly after the invasion, units belonging to the 200th were attacked and ambushed, leaving numerous soldiers dead and equipment abandoned, according to the report.By late May, documents obtained by the Post revealed, hundreds of soldiers had been lost in Ukraine from two battalion tactical groups."Nothing of that brigade is left," Col. Pavlo Fedosenko, the commander of Ukraine's 92nd Mechanized Brigade, told The Post in a recent interview.More recently, the reconnaissance company of the GRU's 3rd Guards Spetsnaz Brigade experienced substantial casualties during the battle for Lyman, as Ukraine pressed ahead with its blitz-style counteroffensive in the Kharkiv region.After nearly 10 months of war, the exact number of Russian troops who have died while fighting in Ukraine is unclear, as the Kremlin does not regularly provide such information to the public."