On opposed to aiding each side, friendly troops are judged as the enemy and mistakenly suffering from being attacking. The original reason is wrong judgment. Battles with the nature of frequent move are likely to cause this kind of incident. More likely to lead to the incident are battles involving troops from many nations. Incidents are investigated in the first Gulf War. The most recent example is a British aircraft shoot down by an America Patriot battery during the Invasion of Iraq. According to CNN, the best-known case for such incident is the death of Pat Tillman in Afghanistan, although it was thought that exact circumstances of that incident had been definitively determined.