From the summary:

“Any such conflict would have a major impact on world oil prices for an unknown period of time at a point the global economy is in crisis. It could trigger serious clashes in the Gulf and spill over into other parts of the region, including Iraq, Syria, Afghanistan and the Levant, and lock the US and its Southern Gulf allies into a period of overwatch and restrikes for years to come. The warnings about the “law of unintended consequences” from two US Chiefs of Staff – Admiral Mullen and General Dempsey – are fully justified.”

Full report here.