South Korean air force servicemembers departed for Guam to participate in Operation Christmas Drop (OCD), a U.S.-led humanitarian program aimed at Micronesia, Seoul said on Tuesday.

U.S. Pacific Air Forces (PACAF) plays a leading role in the airlift operation, which it says dates back to 1952 and is the Pentagon’s longest-running humanitarian and disaster relief training mission.

ROK forces will participate in OCD through Dec. 12 “to improve cooperation between participating countries and strengthen capabilities for humanitarian assistance,” the air force said in a press release, adding that ne C-130 transport plane and 30 servicemembers will participate from Seoul,