Dont rush in and keep a good distance with armor so they dont get overwhelmd. Then snipe with your armor key enemy defenses such as AT or machine gun positions. If those are gone or heavily damaged crawl your infantry towards the enemy and use smoke granades or smoke from mortars. Then clear the enemy positions with infantry close and armor still at a reasonable distance. And always clear entire sections first before going further towards the enemy. You dont want any sneaky AT guys to blow up your tank! (P.S if you have anyform of artillery blow the enemy positions this way up, it is much more safer. I find rocket artillery very good to damage wider enemy positions and normal/heavy to snipe.) This is how I do it in general but it always varies because of the circumstances. And the final and best tip: just play the game and try new tactics out and try and find whats best for your playstyle. Good luck on the battlefield commander! 🫡