There were loads of them. MM never had a SP. It was a multiplayer beta. Might as well call it a beta of NW which it basically was.
It was MM Russia. (5 years ago)
Cheers.
Who else remembers the old 84e conquest? You used to have that artillery train map which Friedrich put a wheat field in the centre. One long big strip which eventually had bridges and buildings put in when MM released.
Or better yet the Amsterdam conquest. Fantastic. 84e siege, conquest and also the waterloo events were by far my highlights off MM.