Jerry DeLarm was involved in clandestine operations in Nicaragua.
His claim alledgedly on 19 Jan 55 when his P-47 (Nicaragua) shot down a Costa Rican F-51D.
Source:
http://www.acig.org/artman/publish/article_162.shtml
If Delarm indeed operated P-47s, then perhaps with 318th FG out of Saipan?
Regards,
Leendert