Here we go again, this same thing happened last year at Haeundae Beach:

U.S. Forces Korea (USFK) said Monday it is cooperating with local authorities over allegations some of its members were involved in no-mask parties on a Busan beach over the weekend in violation of social distancing rules.
Korea Times
According to police, around 2,000 foreigners, including U.S. soldiers, set off firecrackers and held parties without masks at Haeundae Beach in the southeastern city of Busan, marking U.S. Memorial Day.
You can read more at the link.





