K-1 Visa Requirements - How To Receive The Fiancee Visa
https://post-wiki.win/index.php?title=E-2_Visa_Application_Process_For_South_Korea
If they intend to marry a U.S. citizen while they are here, the appropriate visa to get is a fiance visa or the K1 visa. They jump through all on the hoops with regard to you. This is not a hard and fast rule,