Not sure if the Hussars were the original unit of Tamar or one of two. I see another pre-Commonwealth formation providing the bulk of the Pact's ancient military. Have to see if I can find some American-Pakistani connection to the Tamars which we could draw upon.
Another aspect for the write up is the Jaegers relationship to the the Hussars who have recently been nationalized from the private army of Duke Kelswa. I'm leaning towards the pre-madonna view.
Founding date for the Jaegers is no doubt after 2506 the conclusion of the Lyran Civil War.
This limits their battlefield history to the late stages of the Age of War but leaves plenty of space for participation in the Reunification War, the Hidden Wars, the Amaris Coup (which I'd like to include some defections for the Loyalist cause see Tactics of Betrayal), and of course what have they been up to more recently.
Also has their been any expansion of note over the years - what size did they begin at? I'd like to start with 4 regiments given their past canon references.
Finally I'm really liking the whole "Focused Aggression" angle of the Jaegers that is developing. Realizing that the people of Tamar might always be hostile to the Steiners this anger could be put to good use. Hatred of the Draconis Combine and even the Rim Worlds would be encouraged by recruiting practices, training methods, extensive propaganda, along with other innovative efforts. Kurita and Amaris could be made into easy scape goats by the Archons who encourage said behavior as a way to distract against domestic discontent. Second only to their dislike of the Dragon is the former RWR whose homelands they now help occupy. I would think their brutal/ruthless reputation may have carried over from the Combine to here. Ill will from the Reunification War/ Amaris Coup might have the Rimmers another focus of the Jaegers anger.