The Soviet Union decided to intervene directly in the Spanish civil war in spite of its weak international position. Moscow became the only foreign ally of the republican government. Not only diplomats, but also the Red Army soldiers and weapons were employed to achieve the Soviet objectives. Interests of the republican government were only secondary within these aims. The Soviets' international contacts with left-wing intellectuals were used to set the tone for the worldwide newspapers. The Spanish Communist party was weak and its members had not reached expectations of the Comintern until 1936. From 1936, they were under total control of Moscow. The Comintern was in charge of organizing the Interbrigades, but all the Soviet military, political and commercial operations in Spain were supervised by the NKVD. Essential elements of the Stalinist terror and the theme of Trotskyist conspiracy were transferred to Spain in this way, thus discrediting the idea of the Popular Front. By September 1938, an attempt to include the Soviet Union in the system of the Great Powers had failed and the Soviet struggle for collective security was pulled out. Moscow stopped developing plans concerning Spain and stepped off the Spanish internal conflict.