The US Marines are being sent to Belfast - to learn more about how police and the military can work effectively alongside each other in Iraq.
According to a senior PSNI officer who helped produce a major report on Iraqi security forces for the US Congress, the Marines hope to apply the lessons of Northern Ireland in Anbar province.
Assistant Chief Constable Duncan McCausland, who is in charge of Belfast, said a delegation of US Marines will visit Northern Ireland next month.
Mr McCausland was the only non-American who was a member of the Independent Commission on the Security Forces of Iraq, which inspected the Iraqi military and police this summer and reported to the US Congress just before General David Petraeus.
Mr McCausland said the US Marines, who have helped transform the security situation in Anbar province, are interested in how the RUC and PSNI worked with the British Army and want "to look at some of the aspects we're involved in".