In Wardak Province, the counterinsurgency model has been difficult to implement, though US forces have already seen some success in the first phase of the effort.
US soldiers have deep concerns about the force, and say that its members collude with insurgents.
As forces of the 10th Mountain Division have poured into Wardak Province to combat the Taliban, they've also had to battle a cool reception.
NATO forces meet light resistance in Helmand Province, but Afghan insurgents hit back in other parts of the country. Are more US troops needed?
The Marines have experienced 'light resistance' as the try to regain control of a major opium growing region. The Taliban, however, are not giving up in other parts of Afghanistan.
US forces are pushing deeper into Helmand Province, where Americans promoted development throughout much of the cold-war era.
Afghanistan hopes to gain control of more of its territory before August elections. The Taliban could disrupt voter turnout in areas it holds.
About 4,000 soldiers are flooding into the southern Taliban stronghold of Helmand Province in the first test of new US strategy.
In Helmand Province, poppy cultivation funds insurgent activities. As the operation began, the US military announced a US soldier had been captured in another province.