Russia 's land , sea and air drill exercises involve 120 troops , 41 helicopters and 110 tanks . Kremlin calls drill routine , but diplomat says Russia is ` ` very concerned '' by NATO drills . Operation exercises Resolve exercises 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 .