Jacquelyn Martin, Associated Press
President Barack Obama walks across the South Lawn of the White House on return from a fundraising trip to New York City and Connecticut, Tuesday, Oct. 7, 2014, in Washington.

WASHINGTON — President Barack Obama is huddling with top U.S. military leaders to assess their campaign against the Islamic State group, two months after the U.S. started airstrikes that have yet to cripple the extremist group.

Obama travels on Wednesday to the Pentagon, where top U.S. commanders will brief Obama on the latest developments in the U.S.-led effort in Iraq and Syria. Obama will also convene his National Security Council to discuss efforts to rebuild Iraq's military and provide training and arms to the Syrian opposition in hopes they'll fight the Islamic State group on the ground.

The Pentagon has spent as much as $1.1 billion in Iraq and Syria since mid-June. But the campaign has had little success in wresting control of territory back from the Islamic State group.