The game Rise and Decline of the Third Reich (a book shelf game, or whatever they called it) had rules for “attrition.”
To convert that rule into Axis and Allies terms one could do the following:
Add up all the attack values of your pieces that bordered the enemy on that front (for instance Baltic States, E. Poland and Bessarabia border the front created by Poland, Hungary and Romania; Amur borders Manchuria and Korea, etc) divide that number by 20 (I was going to say 18 due to the D6 nature of the game, but that requires a calculator for those not strong in mathematical skills, 20 is easier to do in your head). Your opponent then removes that much attack value from the territories bordering the front you are doing attrition on.
Now, the Rise and Decline game limited this by stating that if you choose attrition, you could not conduct combat moves. To convert to the game, just state that if you do attrition in Europe you cannot do any combat there, Africa no combat in Africa, Middle East, Asia, etc. (This would include all ground and air combat on or over land territories, it would not effect naval combat as attrition does not apply there.)
Benefits:
- You could be assured of never over extending your self by taking land you only wanted to strafe.
- You can utilize 100% of your offensive units on a front without negating their abilities to NCM later.
- Less dice!
Limitations:
- You cannot conquer land
- You have to have more units on the front exposing them to possible counter attack!