A Few Campaign Questions

[Goalie]

I just have a few questions on campaigns in MTW 2. I play primarily multiplayer, but I have recently started playing campaign a decent amount. I am working on a French Campaign and doing fairly well on VH/VH. I was just wondering what building are needed to recruit Dismounted French archers and/or Scots Guards. These are two of the units that drew me to the French and I would really like to use them. I know they are most likely on the tech tree that comes with the game, but that is lost somewhere in random clutter around my computer.

My second question is what are the benefits of fighting a night? I know this was a feature introduced in Barbarian Invasion, but I hardly played any campaign on BI. I have two or three generals that are night fighters and I have used it a few times, but I dont see any major difference. Although I did notice a change in the moral bar to my favor when using it.

So if you guys could help out, that would be great and sorry if these are common knowledge questions.