ZAGREB, Croatia (AP) — The still-evolving military campaign plan to retake Iraqi territory held by the Islamic State group calls for attacking the extremists from several directions simultaneously, and its success depends on getting more Arab help, the top American military officer said Sunday. Obama's signature on the plan would move the campaign into a new phase, Dempsey said, enabled by a larger number of coalition aircraft and improved prospects for rebuilding key elements of the Iraqi army. Over time, Iraqi security forces and Kurdish militia should be able to capitalize on coalition airstrikes by executing offensive ground operations to retake territory now under Islamic State group control, the general said.