The U.S. military issued a sober assessment Tuesday of the Baghdad security crackdown, saying violence had decreased slightly but not to "the degree we would like to see" in the two weeks since 75,000 Iraqi and American troops flooded the capital. The evaluation came as 18 more Iraqis fell victim to sectarian and insurgent violence, including five people whose bodies were found dumped in Baghdad. The U.S. military also announced the deaths of a Marine and three soldiers; three of the deaths were west of the capital in volatile Anbar province, an insurgent stronghold. Maj. Gen. William Caldwell, spokesman for U.S. forces in Iraq, said the overwhelming security operation launched two weeks ago to rein in violence in Baghdad was moving more slowly than hoped. "It's going to take some time. We do not see an upward trend. We ... see a slight decrease but not of the degree we would like to see at this point," he said at a news conference in the heavily fortified Green Zone, according to a report of the Associated Press. However, Caldwell added, "we don't see this as turning into a civil war right now."