I found a reference in "Armies of the Ancient Near East" (WRG) for a dawn attack by Libyan forces against the Egyptians that might make a good battle card. The Libyans tried a dawn attack in an apparent attempt to overcome Egyptian superiority in missile fire.
The effect in the game could be allowing the Libyans to move first, regardless if they are the defender or attacker. That seems powerful so it would have to be an expensive card.
It is found on page 58:
