How long have you got?
Tips I use while playing through the grand campaign (note I'm still in 1941).
- Set up a system that works for you and to ensure nothing is missed. Follow it strictly. For example I always clear up partisans at the start of each turn followed by aircraft reconnaissance and railroad construction before I look at the front line.
- The admin screen includes a production tab which will give you an indication regarding what's in the pipeline in terms of reinforcements coming your way.
- Let your troops rest and if you have the forces, pull some forces back from the front line to let them recover. Don't forget to hit the 'Refit' button for forces you want reinforced more quickly or as a priority. Don't refit the entire army as prioritising everything equals prioritising nothing.
- Don't forget the shift key for launching major attacks. I swear my June 22, not a single artillery piece was used.