 For J. Yoon, he had entered the training camp on September 17 but in the middle of training, he had sustained injuries during a concert in 2008 so he was forced to give up US citizenship and was also serving as a public service personnel.In the middle of military service, M.C the Max also dropped a single album ""So Sick"".In late 2011, the members' military service has ended and they were discharged from the training camp.