Complete the following sentence: The Russian Army had a deception school, active in 1904, dissolved in 1929. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk> 1929 "Field Regulations of the Red Army" stated that "surprise has a stunning effect on the enemy. For this reason all troop operations must be accomplished with the greatest concealment and speed.<unk> For this reason all troop operations must be accomplished with the greatest concealment and speed.<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ "Thus 'in Soviet military art during the 1920s the theory of operational "maskirovka" was developed as one of the most important means of achieving surprise in operations.'" 1935 "Instructions on Deep Battle" and then the 1936 "Field Regulations" place increasing emphasis on battlefield deception.<unk> The 1935 "Instructions on Deep Battle" and then the 1936 "Field Regulations" place increasing emphasis on battlefield deception. Instructions<unk> define the methods of achieving surprise as air superiority; making forces mobile and maneuverable; concealing concentration of forces; keeping fire preparations secret; misleading the enemy; screening with smoke and technical deception; and using the cover of darkness. 1939 <unk>
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