"Now it's going to get worse," said Lance Corporal Julius Wright, 20, one of the marines who withdrew from positions on the frontlines of the embattled Iraqi city that had been under a US siege since April 5.

The marines started a gradual withdrawal to a wider perimeter Friday as the first 200 members of the new Fallujah Brigade moved into parts of the city.

US commanders hope the Iraqi force, made up mainly of former members of ousted dictator Saddam Hussein's disbanded army, will be able to restore some form of law and order to Fallujah, a city partly controlled by anti-coalition forces.

Senior US officers acknowledge they are not fully convinced the deal will work out, and that Marines are prepared to retake their frontline positions if it doesn't.

Many of the grunts, on the other hand firmly believe the idea is doomed.

"Honestly, I don't think they're going to be able to do it," said Corporal Elias Chavez, 28.

"We had the insurgents cordoned off, they couldn't go anywhere, we had a chance to get them."

"Now they can flee wherever they want, and we're still going to have to deal with them," said Chavez, expressing doubts the new force, largely made up of Fallujah residents, would apprehend anti-coalition fighters.

"A lot of them have ties to anti-coalition forces," he said in reference to the Fallujah Brigade.

Colonel John Coleman, chief of staff of the 1st Marine Expeditionary Force, said it is not necessarily a bad thing having some of the more moderate insurgents switch sides. "We'd actively reach out to those people," he told reporters at Camp Fallujah, the main marine base just outside the city.

Some of the grunts who camped out for weeks in abandoned factories and warehouses on the outskirts of the powderkeg city, coming under fire daily, feel they spilt blood in vain.

Scores of Americans died in fighting in Fallujah, which also killed hundreds of Iraqis.

Now that the marines are pulling out without having defeated the insurgents, the deployment "was a waste of time, of resources and of lives," said Chavez.

"Everyone feels the same way, especially those who know someone who was killed," he said.

Wright agreed.

"We pulled out when we should of went in."

WAR.WIRE