Simple cheats.
 
 1) Also build units by combining new units with experience units. New
 unit takes on the experience of the original provide the added unit
 has less members. This can be done by splitting then recombining.
 
 2) Always attack with a large army on one side of the enemy and a
 small unit (cavalry is best) on the other. Make sure the enemy has no
 adjoining units. Each victory then results in the total loss of the
 enemy unit.