During the visit, Austin met with Iraqi Prime Minister Mohammed Shia al-Sudani and Defense Minister Thabet Muhammad Al-Abbasi, according to the Associated Press.

Iraq has served as a point of friction between the U.S. and Iran, with Tehran’s influence in the region growing over the past two decades. Despite U.S. successes in ousting the group from territory it controlled six years ago, Islamic State fighters and sleeper cells have continued to launch attacks in Syria and Iraq, killing or wounding dozens of Iraqi troops in recent months.

“We’ll continue working to accomplish this mission together. Through the global coalition to defeat Daesh, we liberated more than 50,000 square kilometers from Daesh and freed more than 4.5 million Iraqis from their cruel grip,” Austin said, using an Arabic name for the Islamic State, according to the AP.