I applied through a recruiter. The process took 2 weeks. I interviewed at US Army
Interview
You have to have a clean past, and clean lifestyle. The more previous education you ave the better odds you have to advance and progress. Being healthy of course in necessary and no problem with the law.
Other than that recruiter take you by the hand to accept you in.
Interview questions [1]
Question 1
No difficult questions, but perhaps difficult choices in career options and location