They're known to have captured many of them from the Iraqis. Here's one such report: http://www.military.com/daily-news/2015/05/20/isis-captures-hundreds-of-us-

They're known to have captured many of them from the Iraqis. Here's one such report: http://www.military.com/daily-news/2015/05/20/isis-captures-hundreds-of-us-vehicles-and-tanks-in-ramadi-from-i.html http://www.military.com/daily-news/2015/05/20/isis-captures-...