I had been contemplating what combination of killing and other miscellaneous actions would be required for my unreached Ace Tanker in the T-15... then it actually happened.
The quote about not interrupting your enemy when he is making a mistake applied here... our team ended up being horribly ineffective (while I waited in the bushes), then ReddForman and I had to kill eight of their remaining players by our base. Redd then became unable to put his foot up anyone's ass, and I was left looking for the T-26.
It was suggested to visit the enemy's capture point, so I did. A couple of seconds later the T-26 started capping ours. It would have been a draw... and then the T-26 inexplicably DROVE OFF OF OUR CAP.
Now, it stood a chance of making it back in time to attack me... but then returned to capping, so... whoopsie.
The opposing T-15 complimented me at the end. I didn't notice until looking at the AAR that it had
also managed to kill six tanks.