The battleground
Wether you're attacking a hostile region or one of your own regions is attacked by enemy forces, if you decide to battle it out on your own (instead of having the fight simulated), you'll be presented with the turn-based battleground.

The battleground is based on a hexagonal grid, and each battle is made up of different phases. Attacker and defender will make their turn after eachother. If the camera is set to default, the attacker will start on the left, the defender on the right.

Controls
Selecting units
Left-click on any of your units on the battlefield and it'll be selected. Or just select via it's icon at the bottom of the screen.
Moving /attacking enemy units
This is only possible if your selected unit has turns left in the current phase. Tiles your unit can move to are highlighted green, blocked yellow and enemy units within attack range red. Left click to either move to a free tile or attack an enemy unit.
Camera controls
You can move the camera around with the cursor keys, zoom in and out with the mousewheel and rotate it by holding down the right mousebutton and moving the cursor.
The battle phases
Phase 1 - Attacker placing units (one time)
After the battlefield is loaded, the first phase will always be the attacker placing it's unit. If the camera is set to default, then the attacker will be on the right of the screen. The attacker can place it's units freely within the frist two left rows of the battlefield, which will be highlighted in green. Once all units are placed you can press "end current turn". Note that you must place all of your units within the free space before you can end this turn.
Phase 2 - Defender placing units (one time)
Once the attacker is finished placing all of it's units the defender will have to do the same. As with the former phase, the possible hex tiles for placing the defender's units are higlighted in green, but this time they're located on the right of battlefield (for the default camera settings). Press "end current turnr" once you're done.
Repeating phases
The movement phases repeat until one party has been destroyed or retreats.
Phase 3 - Attacker moving
In this phase the attacker will move it's units. Select a unit that has turns left (units that have no turns left in this phase will be displayed darker than others) and you'll see possible movements. Click on one of the green spots to the move the unit there, or click on an enemy unit in attack range (higlighted by a red tile) to attack it.
Phase 4 - Defender moving
Same as the attacker moving phase, only that this time it's the defenders turn. Note that if the defending region owns anti-air guns, they'll automatically fire upon start of this turn and attack all enemy air units.
End of the battle
Once the units of one of the parties have been destroyed (or the attacker retreats) the battl will end and fade over to the result screen. For more information see this chapter.