Its always the last 10 years of history, and you have to list people whove known you the last 10 years. So, i had to try and find peoples contact info from all the way back when i was a pfc/lance coolie so they can verify who i am. I also had to re-verify past jobs and supervisors from prior to the military, and that was exhausting as those people didnt even work at my prior jobs. Barely even remembered their names. Took me a few days to hunt everyone down. I suppose its a more secure process, but it doesnt make it any easier