Richard Sorge
Leopold Trepper was an agent of the Red Army Intelligence and had been working with Soviet intelligence since 1930. Trepper along with Soviet military intelligence officer, Richard Sorge were the two main Soviet agents in Europe and were employed as "roving agents" setting up espionage networks in Europe and Japan. Whereas Richard Sorge was a penetration agent, Trepper ran a series of clandestine cells for organising agents. Trepper used the latest technology, in the form of small wireless radios to communicate with Soviet intelligence. Although the monitoring of the radios transmissions by the Funkabwehr would eventually lead to the organisations destruction, the sophisticated use of the technology-enabled the organisation to behave as a network.