that's the militia - landwehr - jäger line!
Fusiliers are regular standard or line infantry - they have a good firepower, and average hitpoints also melee is quite OK
Grenadiers are the tough guys for the sieges - they have average firepower, high hitpoints and good melee combat abilities, but they are very expensive
Jägers are the marksmen/ snipers - they have great firepower (also on distance) but very little HP and weak melee combat
Dragoons - heavy cavalry with medium speed horses, a carbine musket and sabres
Uhlans - light cavalry with lances as primary weapon and a pistol as secondary
Hussars - very fast cavalry with a sabre
Cuirassiers - heaviest of all cavalry types. they are armoured, have a sabre as primary and pistols as secondary arms