This term is called digital military language, which is a conventional term formed to facilitate the communication between soldiers of various countries. In digital military language, 3 to 6 and 8 are commonly known as 34568; Nine is called ticking.
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For example, in World War II, before landing in Normandy, the United States and Britain allied forces chose similar terrain and waters according to the predetermined plan, and conducted a series of landing combat exercises with brigades and divisions as units.
1944 From the end of April to the beginning of May, a large-scale joint exercise of the armed forces of the army, navy and air force was conducted off the southern coast of England, which played an important role in winning the victory of the Normandy landing campaign by being familiar with the battle plan and practicing coordinated actions. The two world wars provided extremely rich experience for the development of post-war army building, military theory and military training.
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