I remember speaking to several of the people who worked on America's Army back around 2007, when Counter-Strike was all the rage. I think this was at the GDC.

The people I spoke with were from the Army. And they found CS-style games agonizing to watch. So many people running around with no plan, so much friendly fire, so many unrealistic tactics. You could practically see them shudder.

They also had some people who worked in logistics. I remember one of them saying, "If the United States decides to invade a country, the software we wrote could calculate how much toilet paper we'd need."