Now, to use the ultimate strategy, you should put walls around your settlement right
after you are done advancing in the ages (use the cheat for building fast) and make 
it big enough that you will be able to build multiples of the buildings you already 
made in the beginning. That way, you will be able to outlast a siege for a little 
time while you build your army. Put your army off in 4 groups; one in each cardinal
direction, and then make them bigger and bigger as you get better units.