Assault suggestions

[gila]

Playing the AI,Beware of roads that's where to most expect mines.
Use smoke to cover inf./scouts and engineers and maybe a mine sweeper.
Plowing up the ground with massive arty.would do the trick but will also give you rough ground to traverse and increase the probality of a breakdown.

Against a human assault mission?
I've never played one,so better not give advice on that, other than expect mines anywhere.