Claim: The 198th Airlift Squadron was a Puerto Rico based military force under the U.S. Coast Guard that operated between 1944 and 2019 which has its headquarters in Carolina, Puerto Rico.
Evidence: Air National Guard The 198th Airlift Squadron (198 AS) was the last flying squadron of the Puerto Rico Air National Guard (PRANG) 156th Airlift Wing located at Muñiz Air National Guard Base, in Carolina, Puerto Rico.