*cringes*
I...actually...agree...with...Helmet-hair! The Captain of the Clonetroopers, Ambu Fett, says "We have brought the resistance to an end General," and he's talking to Yoda. Yoda doesn't lead the clones though. Kit Fisto leads the clones. Yoda leads a part of the clones. Kit Fisto is at the head of the clones. Yoda brings the remaining Jedi onto the ship when the clonetroopers enter the battle.
wether or not yoda is a general I do not know, nor care for
the thing remains that yoda is one of the most powerful jedi there are. wether or not he gets a rank like general or something else is of no importance. and to be honnest a general normally doesn't lead troops into battle. most of what generals do doesn't involve the front lines. maybe a colonel or a major. but I doubt you'll find a general in battle. and like it even matters which rank yoda get's, you still don't want him against your army.
and that is all that matters
general or not, he's still able to kick your ass