U.S. Marines moved into villages in Taliban strongholds in southern Afghanistan on Friday, meeting little resistance as they tried to win over local chiefs on the second day of the biggest military operation here since the fall of the Taliban government in 2001.One Marine was killed and several others injured or wounded on Thursday, when some 4,000 Marines launched the operation Helmand province.The aim of the operation is not simply to kill Taliban fighters but to win over the local population, which is a difficult task in a region where foreigners are viewed with suspicion.The offensive along 55 miles (88 kilometers) of Taliban-controlled areas in southern Afghanistan will test the Obama administration's new strategy of holding territory to let the Afghan government sink roots in rural areas where Taliban influence is strong.As the operation entered its second day, the units secured control of the district centers of Nawa and Garmser, and negotiated entry into Khan Neshin, the capital of Rig district, Pelletier said.The U.S. will have an opportunity to help develop alternate livelihoods for farmers whose opium poppy crops bankroll the Taliban, who have made a violent comeback since the U.S.-led invasion ousted them from power in 2001.