Perhaps there is a way to play historical battles.
But is necessary some JMM operation.
Example
To build a historical scenarios a player use Solo Mode both side to placed historical positions.
Then at the end save file and upload on depot sav files how 'historical battle of Waterlo at day ...'
JMM build two special launch of LG.
1)For play vs AI,accept sav file and transform Solo Mode both side into Solo Mode
2)For play vs opponent another special launch that deactive key C for change side,tie security key with side how PBEM ,so when load this sav file is already in right side,better with control of time (15 minutes) ,and opponents send for mail own turns.A alternate PBEM mode with security.
I do not know if this is possible,may be an idea.