Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Horsemen of the Apocalypse	Complete operation Black Horse's Last Stand on any difficulty.
It's a Trap!	Complete operation The Kitzingen Ruse on any difficulty.
March of the Tankmen	Complete operation Red Juggernaut on any difficulty.
Steel Beasts	Complete operation Backhand Blow on any difficulty.
Twilight of the Gods	Complete operation Götterdammerung on any difficulty.