Click the General/Commander/Leader to the battle they fought in or which they directed.
Be careful: Often times a general fought in two or more of this battles. But he still only fits to one of those battles as there is only a fitting figure for one of the other battles remaining. So for example Saladin fought in both the battles of Hattin and Arsuf but he would be only fitting for Hattin as there is no other commander of this battle as an option, while for Arsuf there is Richard the Lionheart. If you prefer a version without this extra dificulty I will try and eventually create one :)
It is often diffucult to draw a line between the commander in field, his superior and eventually the king, president, decision making figures. Just choose the most fitting figure.