each piece,except for transports,has an attack and defense number. In the Revised Edition of A&A,for example,tanks attack @ 3 or less and defend @ 3 or less,infantry attacks @ 1 and defends @ 2 or less,etc...what this means is that whenever you send units to attack a territory ,you roll one die per unit and whatever the attack value is,if you roll that number or less,you have scored a "hit". here is an example. I have two men in a territory and you are attacking it with two tanks. So you would roll two dice,one for each attacking tank. Lets say you rolled a 2 and a 5. That is one hit because the attack value of the tanks is 3 or less. Now the defender would roll his two dice,one for each defending infantry. He rolls a 1 and a 4. He scored one hit because infantry defends on 2 or less. Now the first battle is over and each person removes any "hits",in this case one tank for the attacker and one man for the defender. Now the attacker can continue his attack or he can retreat. If he decides to continue,then he would roll one die for his remaining tank. Lets say he rolls a 6. Thats a miss. Now the defender rolls a 2 with his remaining troop. Thats a hit. So the attacker loses his tank,is wiped out and the defender holds the territory. Infantry defense is stronger than attacking because the troops are considered "dug in" and thats why they attack @ 1 and defend @ 2. Fighter planes attack @ 3 and defend @ 4 so they are always good for defense. Bombers attack @ 4 and defend @ 1 so they are great for attacking ..anyhow,the game is awesome and I have been playing it and the variants for about 20 + years now so I can answer any question you can conjure up...good luck rR