Here is one for players new to the campaign map.
Image: Armor unit “Sessler” is selected [RMB] (white), green squares indicate where the unit can move to.
Unit disk color:
The disk surrounding each unit indicate its combat status:
Red: poor condition, cannot attack.
Green: above average condition
Blue: unit in reserve
Yellow: historical unit
Black: unit to be disbanded
Hatched/small red dot area:
The reinforcements that can move onto the active map this turn are colored light blue (boxes).
Reinforcements colored aqua (circle) cannot move on to the active map in the current turn.
Violet colored unit: unit of a friendly country
Red quesion marks: enemy units