I'll answer this over here since the other thread is mostly flaming by SWA/FO. I do not know if WN is trying to hire military guys or the actual numbers. I can tell you as a military guy I know plenty of folks who got turned down. I understand the company tries to put 50/50 in training and pair military guys with 121 guys to mix the experience. I go to class soon so I can let you know.
As for the LOI (simulation). The only thing I can tell you is there is no real way to study for this. I got the same simulation card as the other 3 guys I was paired with. We all had different solutions. 2 got hired, 1 did not. During the actual LOI, the person in the FO seat has all the power. One fact given or held back (on purpose or because you didn't ask the right question) changes the entire scenario. The only real thing I can tell you is make a decision! Good luck.