Oct 1 is the National Military Day in Korea, to honor the troops.
When the Military sends entertainers serving in there to events, the entertainers have to go since it is a military order.
I remember Yunho of DBSK and Jaejoong of JYJ performing together while they were in the military
(Changmin was serving as a police so didn't have a chance to see Jaejoong)
Although it is not known whether they interacted, since the military had sent them in the same event, they had to perform since orders are orders.
Without the Suga drunk driving incident, we would have seen Corporal Kim Namjun, Corporal Kim Taehyung and Corporal Park Jimin on the show. (Jimin and Jungkook are in the same unit and they do not let two people in the same unit to show up together)
It would be the only time the immortal songs staff would have BTS on the show and it would have generated a worldwide attention.
However, the Suga drunk driving incident probably put a stop on it, and instead there were people like
Jung Seunghwan, who received a song from IU
Jo Seungyeon, aka Woodz, who is in Edam Entertainment
Lim Donghyun, stage name Lee Dohyun, who in a previous life had met a much younger IU
Instead of having three BTS members , they were changed to three people who have something to do with IU!
Although IU did not show up, it showed the enormous power she has in Korean pop.
Hybe's failure to crush her domestic power did harm BTS a lot and her influence, now Kpop is in its dotage, will only grow more, exacerbating KPop's decline