What should you do in land and space battle? Number is not the only factor that decide the outcome of a battle.
No matter you playing as Empire or Rebel, battle is the key success to achieve victory. There is some factor that you should consider before and during a battle. Using these consideration and some improve tactic, you can increase your combat skill both in space and land.
Land Battle
Always Pause the game before a battle. Check the map and consider advantages and disadvantages of your position, also chek your units and enemy's units abilities. Always create groups when you're in battle. This way you'll only have to hit a number to select and switch between groups of units. Pausing the game during combat can also be quite useful so that you can take your time figuring out how you want to approach the fight and you can select units and have them target enemies while the game is paused.
Do not engage the enemy frontally, when enemies attack you, they tend to pick on one unit. Keep this unit from dying, move it back out of range, then bring some reinforcement tho help him. This is especially effective when your unit has shields, When their shields are low pull them back so that they can fully recover.
Use T4-Bs, MPTL-2A Artillery, TIE Maulers, AT-STs, SPMA-Ts, AT-AAs, and AT-ATs to walk over and kill infantry units and Imperial Scout Speeders. TIE Maulers are most effective with this tactic because they're very fast and maneuverable. You have to be careful attacking large groups of enemy infantry with an AT-AT, because they're so slow and unmaneuverable that sometimes infantry can destroy the AT-AT.
It is a wise decision to bring a field commander together with your troops. He can increase visibility range and durability to all your units, and a field commanders are very effective defensive infantry too. He is very useful on assaults where you start out with few units, because he can capture build pads and act as a last-ditch defense against enemy infantry. For example, on planets where you start out with a population cap of 3, I often bring in two T4-B groups and a field commander. The field commander can capture build pads for repair stations and turrets, then hang back until the area around another reinforcement point has been cleared and it can be captured.
Air support can be crucial to achieve victory. Always have Bombers (Y-Wings for Rebels, Acclamators/Victory Star Destroyers/Imperial Star Destroyers) go along with your ground unit fleets so they can do bombing runs on any planet you assault. Bombing runs often make things way easier, you can destroy tubo laser towers and clear the path for your ground unit.
Space Battle
In space, the space stations and larger ships have individual hard points that can be targeted. These hard points include shield generators, hangars, engines, lasers, and missile launchers.
To prevent enemy ship or space station from releasing their fighters, you can target their hangar, target it as soon as possible. After that target their weapon system in order to decrease enemy fire power, this way they wont be able to hurt you. After that target their engines to avoid them to escape. Shield generators should also be taken out to make it easier to destroy a ship with laser fire.
When you're attacking a big enemy ship or space station, it's usually a good idea to have your ships target the next hardpoint a few seconds before the one you're currently hitting is destroyed. This is especially true if you have a lot of Corellian Gunboats, which fire sort of slow-moving concussion missiles. Concussion missiles do about .5-1% damage to a space station hardpoint, so if the hardpoint is at 5% and you see 10 or more concussion missiles going at it, you can safely switch to the next target. This doesn't matter much if you've defeated all the enemy ships and just the space station is left, but if time is critical, you need to apply your firepower as quickly as possible.
In both types of battle, it's a good idea to use multiple groups for a type of unit which you have a lot of. For example, if you have 12 Corellian Corvettes in a space battle, put them into two groups, otherwise their firepower will often be wasted on smaller targets. Likewise, in ground battles, put T4-Bs in two groups, because they're so slow they're easier to control that way, and they have so much firepower that if you have lots of them, you might want to use them in different areas of the map or have them target different enemies even if they're together.
