Why were snipers so effective in the Battle of Stalingrad?

Snipers of the Soviet Union played a useful role mainly on the Eastern Front of World War II, apart from other preceding and following conflicts. In World War II, Soviet snipers used the 7.62×54mmR rifle cartridge with light, heavy, armor-piercing, armor-piercing-incendiary, zeroing-and-incendiary, and tracer bullets. Most Soviet World War II snipers carried a combat load of 120 rifle cartridges in the field.

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explanation:

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).