On the night of 1 July, the Japanese stormed across the Khalkhin Gol and seized a strategic hill threatening the Soviet flank. In three days of heavy fighting, however, Zhukov eventually forced them back across the river in a counter-attack with his tanks. He then occupied part of the east bank and began his great deception – what the Red Army termed maskirovka. While Zhukov was secretly preparing a major offensive, his troops gave the impression of creating a static defensive line. Badly encoded messages were sent demanding more and more materials for bunkers, loudspeakers broadcast the noise of pile-drivers, pamphlets entitled What the Soviet Soldier Must Know in Defence were distributed in prodigal quantities so that some fell into enemy hands. Zhukov, meanwhile, was bringing in tank reinforcements under cover of darkness and concealing them.… At 05.45 hours on Sunday, 20 August, Zhukov launched his surprise attack, first with a three-hour artillery bombardment, then with tanks and aircraft, as well as infantry and cavalry…. Zhukov was undismayed by his own losses.… Despite the Japanese determination never to surrender, the Kwantung Army’s antiquated tactics and armament produced a humiliating defeat.… The battle of Khalkhin Gol thus represented a major influence on the subsequent Japanese decision to move against the colonies of France, the Netherlands and Britain in south-east Asia, and even take on the United States Navy in the Pacific. The consequent refusal by Tokyo to attack the Soviet Union in the winter of 1941 would thus play a critical role in the geo-political turning point of the war, both in the Far East and in Hitler’s life-and-death struggle with the Soviet Union.
— Antony Beevor, The Second World War-