Defensive and Offensive Modeling

It is about modeling for offensive and defensive force concentration.

1. 6/4 ( Defensive force is 4 soldiers, the attacker( offender would be 6 soldiers) 
2. 6/2
3. 3/1
4. 5/1

For example, the ISIS do have 13,000 soldiers in Tikrit. The Iraqi's alliance force would be applied with either one of the about modeling.