BRUSSELS (AP) — U.S. Defense Secretary Ash Carter says he expects a gathering of more than two dozen countries contributing to the war against the Islamic State in Syria and Iraq to endorse a U.S. plan for accelerating the campaign this year.

Speaking to reporters Thursday at NATO headquarters in Brussels, Carter said he would lay out details of the campaign plan in an afternoon meeting with allies and non-NATO partners such as Saudi Arabia and Iraq.

In doing so, he will ask the others to find ways to increase or broaden their contributions — either militarily or in other ways such as financial contributions.

Carter said the U.S. is determined to accelerate the war campaign and recapture as soon as possible the Islamic State's main strongholds in Syria and Iraq.