Swansea City midfielder Ki Sung-yueng has returned home to South Korea to carry out four weeks of military duty.
South Korea is technically at war with its neighbours in North Korea, and the divide between the two countries is the most heavily militarized border in the world.
Ki will miss Swansea's final Premier League game of the season against Manchester City on Sunday as he has been granted leave by the club ahead of undertaking his national service.
"There is no Ki this weekend because of his military service,'' said Swansea manager Francesco Guidolin.
"He has to do four weeks and we want him to have some more time for his holiday.''
Every Korean must serve two years' compulsory military service before the age of 29 or face being exiled from the country.
Ki was part of South Korea's bronze medal-winning squad at the London Olympics in 2012 before joining Swansea from Celtic for a then club record fee of £5.5 million.
Winning an Olympic medal allowed Ki and his teammates to have their mandatory two years of military service reduced to four weeks.