Some other things to consider after you establish the initial entry criteria:

- The situation inherited by the general - all factors of METT-TC and lets include domestic and geo-politics to boot

- The scope of the task(s)/objectives/ends to be achieved

- The amount of means at hand, and his stewardship o those means in light of the circumstances

- The skill and reputation of the opponent (and the means at the enemy's disposal)

- the courage required to persevere in the face of difficult odds both on the battlefield and on the home front

- the enduringness of the outcome - was this an accomplishment that keeps the state from having to go back in 5-10 years down the road

There are probably many others, but I think these are a few that distinguish "great" from "good".

Regards, Rob