Spurred on by a continued decline in violence, the U.S. military will reduce its presence in Iraq to 14 combat brigades this month " at least two months earlier than originally planned. Military officials said two brigades from the 101st Airborne Division will leave Iraq this month and only one will be replaced. A brigade is roughly 3,500 soldiers. Initially the 3rd Brigade, 101st Division, was scheduled to leave this month, and the 2nd Brigade, 101st Division, was to leave by February.On Wednesday, however, the military announced the 2nd Brigade will instead return to its Fort Campbell, Ky., home base this month, after serving for 13 months, rather than the expected 15. The unit served in northwest Baghdad, where violence has plunged, including a 50 percent decline in overall attacks in the area and a more than 90 percent drop in murders. U.S. forces have also seen a dramatic decline in troop fatalities, with deaths falling to their second lowest monthly level in October. There were 14 U.S. troops killed last month, including seven lost in combat. That total was one more than the 13 deaths in July " the lowest monthly level of the war. President Bush announced in September that the military would go from 15 to 14 combat brigade in Iraq some time in January " following recommendations from Gen. David Petraeus, then his top Iraq commander. The decision sparked sharp criticism from Congress members who wanted Petraeus to recommend a swifter and larger drawdown in Iraq. And the plan appeared to push decisions for any more aggressive troop cutbacks to the next administration.