SEOUL, South Korea (AP) — K-pop giants BTS are back.

A free concert on Saturday night in Seoul drew tens of thousands of fans from around the world.

The city’s skyscrapers glowed with BTS advertisements as the city washed itself in purple, welcoming a legion of global supporters who call themselves the “Army.”

The group’s comeback follows a nearly four-year hiatus due to South Korea’s mandatory military service, which requires most men to serve 18 to 21 months. Members began enlisting in 2022, with Suga the last to complete his service in June 2025.