ARLINGTON, VA - MARCH 11: U.S. Secretary of Defense Ash Carter answers reporters' questions during a news conference with the United Kingdom Secretary of State for Defense Michael Fallon at the Pentagon March 11, 2015 in Arlington, Virginia. Carter and Fallon held a bi-lateral meeting to discuss many topics, including the ongoing campaign against the Islamic State of Iraq and the Levant (ISIL) and their countries' continued work to help the Ukraine government forces improve their capabilities in intelligence, communications, logistics and first aid. (Photo by Chip Somodevilla/Getty Images)
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Delta Force mission underway in Iraq
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Crisis in Iraq 13 videos
ARLINGTON, VA - MARCH 11: U.S. Secretary of Defense Ash Carter answers reporters' questions during a news conference with the United Kingdom Secretary of State for Defense Michael Fallon at the Pentagon March 11, 2015 in Arlington, Virginia. Carter and Fallon held a bi-lateral meeting to discuss many topics, including the ongoing campaign against the Islamic State of Iraq and the Levant (ISIL) and their countries' continued work to help the Ukraine government forces improve their capabilities in intelligence, communications, logistics and first aid. (Photo by Chip Somodevilla/Getty Images)
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Members of the Iraqi forces watch Donald Trump giving a speech after he won the US president elections in the village of Arbid on the southern outskirts of Mosul on November 9, 2016, as they rest in a house during the ongoing military operation to retake Mosul from the Islamic State (IS) group.
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Story highlights

CNN has learned that Delta Force plans to replicate the strategy that Special Operations forces used for years in Iraq and Afghanistan

Ash Carter told reporters that he fully expects the U.S. to play a greater role in assisting the Iraqi military's effort to retake Mosul

Washington CNN  —