No True total war game.
If you just want battles there are a few games you can try.
Histwar Napoleon, is out, with sevral big updates, play napoleoinc battles with up to 500 000 soldiers, no 2000 soldier armies fron total war here. A single brigade usualy got more soldiers then a whole army in total war.
How ever I would recomend you wait a few months. if you have steam to to "greenlight" and search for histwar, there you can vote to get it on steam. It's called histwar austerlix.
I would wait for it to either get on steam, or the next big update comming this vinter, it had MASSE grapghical upgrade both the soldiers and animation(right now soldiers are square and stiff) The new update will make the soldiers up the rome 2 standard.
But when that update(or upgrade if you like) comes we don't know, some time late fall early winter.
But if you can't wait for that in a few weeks another big update will be added, that ads true brigade and divisjon command(right now you mostly give command to whole corps, giving you less command and control feel)
It's a good game now, by chirstmas it might be an epic game.
The game has 3 map sizes, two for piched battles, another "campaign" map thats hundreds of square km. were you have to use cav to find and fix the enemy ect.
The game comes with Order of battle editor(make your own armies) So far you have Russia, France, Sweden, Austira, and the corps of Prussians that fought at Eylau. As well as "minor" states like Polen, italy, denmark ect.
All units are historical, so you can add the 13e legere to your army ect.
It also comes with map editor thats easy to use, and doctrine editor.
It's quite epic seeing a cavarly mele of 20 000 troopers and horses.
Right now you have the choice of 1:10 or 1:2 scale figures. But a 1:1 is coming to, letting you play eylau with the full 160 000 soldiers. Lots of cool detalies, like if you add the 17th Line to your 1806 army, it will have the white uniforms they used for that short period.
Another game is Scourge of war gettysburg, again just battles. same style of game as histwar but more polished. and ofcourse sett in the ACW, but those guys are comming out with a waterloo game next year.