Allieds in Normandy. Need help with combined arms tactics.

[Stratos]

Any series of tips I can follow in order to improve my combined arms tactics? I find really hard to fight in Normandy with all those houses full of enemy troops or the Bocage hiding AT guns. Other closed areas like Italy or Germany itself share the same problem. How should I move on areas like that? Infantry and Tanks at same pace sharing the same HEX? Or infantry a bit forward? If I use the tanks forward I normally lose some them, the same with infantry, the squad gets pinned and normally chopped down. I can't find the aproppiatte tactic by myself so will apreciatte a bit of help on this.
Thanks a lot!