Between 2010 and 2011, reports by the United States Army show that 8 soldiers died from heroin overdose while serving in Afghanistan.
Across the entire Army, the number of soldiers who have tested positive for heroin has increased ten-fold since 2002. In Fiscal Year 2002, there were 10 reported cases of soldiers testing positive for heroin. In FY 2010, there were 116 positive results of heroin.
Source: Michael Martinez, “Opiates killed 8 Americans in Afghanistan, Army records show,” CNN, April 23, 2012.