 Complete the following phrase:  During the Interim Peace in 1940, Hallamaa traded cracked Soviet ciphers with other states to fund Finnish signals intelligence operationsfor example to the Swedes in exchange for RCA transmitters. Hallamaa was promoted to lieutet colonel and appointed the commander of Defence Commands Radio Battalion  in October 1941 during the early months of the Continuation War. Finnish radio intelligence had grown from 75 persons during the Winter War to approximately 1,000 soldiers. Reportedly, they were able to decrypt 80 percent of Soviet messages on the Finnish front. Collaboration and exchange of Soviet ciphers with Japan bore fruit when the Soviets switched their western front ciphers in late 1941 with the eastern ciphers used in Vladivostokimmediately decryptable due to the exchange. In 1942, Finnish intelligence cracked telegrams of the Allied convoys PQ 17 and 