Air strikes alone will not be enough to destroy Islamic State fighters in Iraq and Syria, and Baghdad will need training to rebuild ground forces capable of “going after them and rooting them out,” the U.S. Army Chief of Staff said on Wednesday.

Three years after U.S. forces pulled out of Iraq, President Barack Obama has ordered air strikes to halt Islamic State fighters who made rapid advances earlier this year as Iraqi forces melted away.

General Ray Odierno, who commanded U.S. troops in Iraq from 2008 to 2010, said it was the sectarian bias of Iraq’s army rather than any failings in U.S. training that had led Iraqi forces to collapse against the Islamic State onslaught. […]