Initially, the Soviet leadership hoped for a successful socialist revolution in Germany as part of the "world revolution". However, the revolution was put down by the right-wing freikorps. Subsequently, the Bolsheviks became embroiled in the Soviet war with Poland of 1919–20. Because Poland was a traditional enemy of Germany (see e.g. Silesian Uprisings), and because the Soviet state was also isolated internationally, the Soviet government began to seek a closer relationship with Germany and therefore adopted a much less hostile attitude towards Germany. This line was consistently pursued under People's Commissar for Foreign Affairs Georgy Chicherin and Soviet Ambassador Nikolay Krestinsky. Other Soviet representatives instrumental in the negotiations were Karl Radek, Leonid Krasin, Christian Rakovsky, Victor Kopp and Adolph Joffe.