 Only in the Second World War did deep operations come into play.The Red army was involved in armed conflicts in the Republic of China during the Sino-Soviet conflict (1929), the Soviet Invasion of Xinjiang (1934), when it was assisted by White Russian forces, and the Xinjiang rebellion (1937).The Red Army achieved its objectives; it maintained effective control over the Manchurian Chinese Eastern Railway, and successfully installed a pro-Soviet regime in Xinjiang.