The last we saw of Company of Heroes 2 was multiplayer expandalone The Western Front Armies, but what about people who prefer single-player? Don't they deserve expandalones? Aren't they inherently more alone? Hold your horses and hang onto your butts, dear single players, as Relic today announced Ardennes Assault, an expandalonealone for CoH 2 seeing US Forces fending off Germany's Oberkommando West during the Battle…