In July 2004, Polish troops also found evidence of degraded chemical weapons when they discovered insurgents trying to purchase cyclosarin gas warheads produced during the Iran–Iraq War. In their efforts to thwart insurgents acquiring these weapons, Polish troops purchased two rockets on June 23, 2004. The US military later determined that the two rockets had only trace elements of sarin that were so small and deteriorated as to be virtually harmless and would have "limited to no impact if used by insurgents against coalition forces".