Both British and American had there own secret spy network involving over 320 agents of Ukrainian origins . Out of the 135 agents sent to Ukraine between 1949 to 1954 five of them survived two of them managed to get into British embassy in Warsaw and smuggled into West Germany. The other three took the Hungarian route and using the Hungarian uprising in 1956 . Most of the operation was failed by Kim Philby and Myron Matveinko, Myron was a double well-known to Gestapo and NKVD who else knew Gehlen did . The last commander of UPA Vasyl KUK sent a message to SIS and CIA not to send anymore agents saying they were a liability to the UPA this was in 1952 and Americans still had three radio operators in 1953 .