According to David Isby, the Russians realised how valuable women snipers could be during World War II.
“The Russians employed over 1,000 women snipers along the Eastern Front. So, when will we allow women in combat arms units? Since 2003 I have lost 55 of my friends, all men.”
Source: Devaney, D.K. (2012) Women in Combat Arms Units. Marine Corps Gazette – Quantico. Jun 2012, pp.62-64.