In "Civilization", each unit has attack, defense, and health factors. For instance, an armoured unit has an attack factor of 24 and the unit defending has a defense factor of 14. The attacker has a health factor of 4 and the Defender has an attack factor 2. The Basic Odds are easy: 24/14. Losing to a Defender with a health factor of 1 is easy: (14/24)^4. But how does one calculate the Odds if the Defender has more than 1 health factor? (and did I make any mistakes above?)