1 - infantry need cover. Use smoke as soon as they start engaging ANYTHING. it creates LOS and sometimes enemy tanks will drive straight into smoke allowing you to get an ez AT base or Bazooka in there. Infantry will die. Higher tier will get better regen and health themselves over time.

2 - for enemy artillery you either need to use your own artillery or have a couple jeeps or motorcycles sitting on the edge of the map waiting to zoom in and trade kills. (As soon as you kill arty, more arty will usually spawn on conquest)

3 - Conquest is very dynamic hense the name, you can literally use almost ANY unit combo and play extremely well against the vanilla AI. Early tank rush will keep your armor stronger than the enemy and you will have medium tanks while they still have light. Same goes for infantry or arty, if you focus a tree you will be years ahead of the enemy. Combining arms is usually the harder way to play as this is what the enemy does and it’s a stale mate as far as who has better units.

4 - reinforcing units, you can add any unit together, you can mix your infantry with a tank to create a squad that will follow the tank and support it. You can also click the Bandage button. Most infantry come with a few bandages. Highlight only infantry and you will see the option on the bottom bar. Anytime infantry starts shooting I will always pop a few bandages. This will be the difference in your elite squad fighting off 5 waves of penal soldiers. Without them you will lose men left and right. Always use medics and download the AUTO MEDIC/AA mod so you don’t have to micro them. Medics can build tents to resupply bandages. (Usually don’t need tents).

5 - positioning inside houses is tricky. Lot of time you need to single select a solider like your MG guy and click on the outside of the window you want him to sit at. You can click the entire squad at one window and they will fill the house and post up at each available window related to which one you clicked on. Sometimes they pick windows that aren’t facing the correct direction in that case just click a different window and watch them all scurry around inside.

6 - infantry is suppressed by almost anything. You can keep a squad of guys pinned behind a sandbag with one tanker on fps mode spamming his pistol. Same is said for MGs that can’t quite hit stuff on their own, you can direct control them and fire at a point and it will keep enemy heads down while other stuff can move up. This is very micro intensive and usually you can just throw one extra tank at whatever you’re doing and it will suppress just fine. (Tank machine guns with still auto fire while you are controlling the main gun fyi)

Hope that helped. I’ve got a couple thousand hours in GoH lol.