I have no inside knowledge, but I would think that in some ways you have to know how old your character is before you start. THEN, you can roll on a special table for these events.
The Minbari War will probably be the biggest issue. Even a newbie 18 year old, will have been alive during the E-M war. I am sure there will be an Event Table for that.
Older characters will have been involved in the Dilgar War or any of a dozen other conflicts (internal and external to the EA). Tables will have to exist for them.
Also, there will be a table for the Shadow War (remember it only lasted 3 years, so 1 term will cover it), maybe another Event Table for the Earth Rebellion and then something for the Crusade timeline (maybe).
Aliens will have similar tables. There will be the Narn war of Independence etc. that can be handled by Event Tables.
It might be a bit complicated, but it is certainly doable. One of the great benefits of the new Traveller Character Generation method is it's flexibility in these kinds of situations.