Do you think Saddams army of over 100,000
are more likely to be dedicated freedom fighters hitting only military targets or terrorists willing to kill anyone to be back in power?
Of the former iraqi soldiers many of whom were conscripts which portion do you think are most likely to continue fighting the US?
Do you think ordinary citizens or former soldiers are most likely to take up arms against the US?
The answers to these questions should help lead to an answer to your question.