Great news from Richard Borg posted yesterday on BGG:
All I can really state on this subject is "Wait for it".
Leaders are about to take a very bold step forward, that is when the Generals, Marshals and Tacticians details are released by GMT. Right now it looks like La Grande Battles along with the Generals, Marshals and Tacticians rules should be out sometime next year.
Fans of the Napoleonic game will not be disappointed!
For now please enjoy the Austrian Army.