 Typically, only a small fraction of the Marines and Sailors who are permitted to try out for CQB Platoon are actually selected from the grueling two-week selection process.Those who are selected then have a tactical spin-up (a period of intensive preparatory training,) before reporting to USMC CQB School where they undergo an intensive seven-week advanced combat marksmanship and dynamic assault course.The Marines and Sailors learn to violently recapture and take back by force, the United States personnel and property that has been stolen or otherwise compromised.