In 1938-1939. Japan tested the defenses of the Soviet Union on Lake Khasan and the Khalkhin-Gol River. At the same time, the Japanese military developed a plan for waging a war against the USSR. The conclusion of the Soviet-German non-aggression pact in 1939 without Tokyo’s notification by Berlin forced the Japanese leadership to reconsider this plan, because Japan was not going to fight the USSR alone. She began to prepare for a war against the Western powers in East Asia and on April 5, 1941, she signed a neutrality treaty with the USSR, without coordinating it with Germany.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.