Ash Carter lays out plan to take back Mosul, Raqqa from ISIS

Carter also announced that a special commando force has now arrived in Iraq

Defence Secretary Ash Carter laid out broad plans today to defeat Islamic State militants and retake the group's key power centres in Iraq and Syria.

He also announced that a special commando force has now arrived in Iraq.

Speaking to troops from the 101st Airborne Division who will soon deploy to Iraq, Carter also said he would meet in Paris next week with his defence counterparts, mainly from Europe, and will challenge them to bring more capabilities to the fight.

He said he will be meeting with defence leaders from France, Australia, Germany, Italy, the Netherlands and the United Kingdom.

"Each of these nations has a significant stake in completing the destruction of this evil organisation, and we must include all of the capabilities they can bring to the field," he said.

Carter's broader message signaled the completion of a military plan to help Iraqi and Kurdish Peshmerga forces retake Mosul in northern Iraq and to assist the Syrian moderate forces oust Islamic State militants from their headquarters in Raqqa.

He described operations that would send Iraqi forces from the south and Peshmerga forces from the north to encircle and cut off Mosul.

But he warned that taking it back will not be quick or easy.

Carter announced in December that the US would deploy about 200 special operations forces to Iraq to better capitalise on intelligence and put more pressure on the enemy.

"The specialised expeditionary targeting force I announced in December is now in place and is preparing to work with the Iraqis to begin going after ISIL's fighters and commanders, killing or capturing them wherever we find them, along with other key targets," Carter said.

His speech offered an upbeat assessment of the anti-ISIS campaign, saying that coalition-backed forces, supported by the airstrikes, are taking back territory and going after the groups finances.

This week airstrikes hit an Islamic State cash centre in Mosul.

His remarks came a day after President Barack Obama's State of the Union speech, expanding on the message that the US must build and work with local forces in Iraq and Syria to have lasting success.

He said the US must not "Americanise" the conflicts because that would allow militants to accuse the West of occupying the country.

About 500 troops from the 101st Airborne headquarters group will deploy at the end of February and about 1,300 members of the 2nd Brigade Combat Team will deploy to Iraq in late spring.

The brigade will be training Iraqi and Peshmerga forces.