"The compound of bigness and communism made Soviet Russia very much an ogre in the 1920s and accentuated her isolation from the rest of the world. In turn the Soviet's acute sense of isolation, the sense of living in a perilous world and, above all, the bitter memory of foreign intervention between 1918 and 1920, made her, in self-defence, more authoritarian in her internal policies, and spurred the campaign to regiment and unify her people and fortify her economy, thus conferring on the word 'communism' an additional wrapping of terror. This sense of isolation must have also intensified the Soviet Union's desire to extend her territory and her sphere of influence in eastern Europe, and she seized the opportunity which came at the end of the Second World War."