Russian troops have used chemical agents banned in warfare as a psychological operation to sow panic among the Ukrainian forces, said Vlasiuk from the Support Forces’ Radiation, Chemical and Biological Protection Command, a branch of the army responsible for inspecting chemical warfare.Russian drones throw gas grenades into dugouts or trenches in a brutal tactic to force Ukrainian soldiers out into the open field, making them easy prey for drone or artillery attacks. ‘Silent killer’: Russia boosts grinding Donbas advance with chemical warfareGasping for air from a trench in eastern Ukraine, an infantryman was ready for the worst when a suffocating white smoke spread into his position. A Russian drone had just dropped a gas grenade into the trench, an internationally banned practice in warfare used to suffocate Ukrainia…The Kyiv IndependentAsami TerajimaOf the 323 recorded cases of Russia's chemical attacks in October, nearly all except 15 incidents were "unidentified," Vlasiuk told the Kyiv Independent on Oct.