For me - one of the immersive elements of Paradox's games, whether it's EU3 or HOI3, is the ability to name my units historically. I know - someone on this forum told me once this was "hard fun" since it can take quite a bit of time.
At this time, the British Army organized its infantry units into regiments. The Oxford History of the British Army (Chandler 2003), which I picked up at the library this morning, notes that at the time of the Third Coalition, the British Army listed over 100 regiments - but says nothing of the brigade system on which MOTE is based. Moreover, I can find no reference to the brigade names used in MOTE.
I know I'm being a complete geek here, and none of this is meant a criticism of the game (consider how much I must like the game if I'm willing to spend this much time renaming units ...). I'm curious if anyone else renames their units to historic regimental names, or uses any historic organizational system or OOB.