Tips:
Always build units by combining new units with experience units. :New units take the experience of the original provided the added unit has less members. This can be done by splitting then combining.
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.

1,000,000 cash:
Pause game and type in save the city