Russia 's land , sea and air drill will involve 38,000 troops , 41 ships and 110 aircraft . NATO calls drill routine , but diplomat says Russia is `` very concerned '' by Kremlin drills . Operation Atlantic Resolve billed as response to Russian actions in Ukraine , Crimea .
Russia 's land , sea and air drill will involve 38,000 troops , 41 ships and 110 aircraft . Kremlin calls drill routine , but diplomat says Russia is `` very concerned '' by NATO drills . Operation Atlantic Resolve billed as response to Russian actions in Ukraine , Crimea .