Sniping proved an important factor in the static trench warfare of World War One. But after the war armies let the skill languish has mechanized combat units came into their own. World War Two thrust snipers back into prominence as the Russian, German, British, American and Japansese armies trained new sniper forces in diverse ways to address their own specific battlefield requirements. Snipers effectively sewed fear and confusion among enemy forces but also suspicion in friendly forces since they worked alone outside the normal operation of infantry units.