Judging from fighters captured in Fallouja, all but about 5% are Iraqi, U.S. officials say.
As for the taking of Fallouja, which the US has been boasting about, well, they haven’t really taken it nor did the bulk of the insurgents stay and fight. In classic guerilla warfare tactics, they retreated as the larger force advanced, leaving enough fighters behind to inflict serious damage on the Americans.
This 5% figure gives lie to the oft-babbled statements from the neocons that the Iraq insurgency was mostly outsiders. Just more of their lies.