Leeteuk stated in September 2011 that he planned to enlist for his mandatory military service in 2012. He made his final appearance before enlistment at the Style Icon Awards on October 25, 2012. On October 30, 2012 he reported to the 306 Reserve Battalion training camp in Uijeongbu, Gyeonggi Province, to undergo five weeks of basic training, followed by active duty for 21 months. He was initially ineligible for active duty following a car crash in 2007 and an aggravated herniated disk, but after receiving treatment he was able to enlist for active duty.