yeah its reaally hard, im only missing the russian one cos of a problem on mission 4, read my other thread, its like 1 or 2 places below this one
, its really hard but once u get the point of it, like never tell ur men to shoot something, but press ctrl and im urself, also with the tanks remember to look in their inventory for a repair box, saves u a lot of hastle :P, i recommend starting with the german one, its my fav, and i think is the easiest, the first english mission is provably the hardest of all the game, then the american missions arent that hard once u get the trick of it, and the russian ones are hardish. but yah as i said, start with germans, and be patient above all, and ALWAYS aim urself