The group 's last major operation of the war came between 16 January and 19 February 1945 . Under Operation Argonaut , the 1st FG escorted British and American delegations to the Yalta Conference , deploying 51 P-38 's to protect the ships and aircraft carrying President Franklin D. Roosevelt , Prime Minister Winston Churchill , and their aides to and from the Crimea . The group changed bases shortly after its return to combat operations , moving to Lesina . There the 1st Fighter Group received two YP-80A jet fighters ( serials 44-83028 and 44-83029 ) sent to the theater for operational testing ( " Project Extraversion " ) . Although the jets were marked for combat operations with easily identifiable tail stripes and the letters ' A ' and ' B ' on their noses , and flown on two operational sorties by the 94th FS , neither saw combat before the end of the war
Yalta Conference
Yalta Conference
1st Operations Group