Basically you don't want to move troops towards any objective without fire support.
You'll want to lay mortar rounds on suspected enemy positions and also smoke to obscure your movements or mislead the enemy.
HINT: Allocating AMMO to the status bars lets you see your ordnance situation at a glance. This Anti-Tank gun fits nicely in a trench. Ammo is low.
The Junkers Stuka dive-bomber was an effective form of fire support, often severely sapping enemy morale.
The Junkers Stuka dive-bomber was an effective form of fire support for the Wermacht, often severely sapping enemy morale.In a dive the pilot would engage a siren on the landing gear which emitted a terrifying howl!