"We are not proposing independent combat operations by Australian and other coalition forces," he said.
"It is about helping the people of Iraq to reclaim their country."
Australia's defence force chief Mark Binskin overnight on Tuesday attended a briefing with other coalition military leaders at the US Joint Base Andrews in Maryland hosted by chairman of the Joint Chiefs of Staff General Martin Dempsey.
US President Barack Obama told reporters after the meeting the mission in Iraq, now involving 60 nations, was achieving its short-term aims against IS, or ISIL, but it would be a "long-term campaign".
"Because of the numbers of foreign fighters that are being attracted, and the chaos that ISIL was creating in the region, ultimately it will pose a threat beyond the Middle East, including to the United States, Europe, and far-flung countries like Australia that have already seen terrorist networks trying to infiltrate and impact population centers on the other side of the world," Mr Obama said.
- AAP