WASHINGTON, D.C. (WVEC) -- After more than three years and 18,000 air strikes in the war against ISIS, the end still does not appear to be in sight.

But there has been progress, according to Canadian Armed Forces Brigadier General Dave Anderson. The Combined Joint Task Force Operation Inherent Resolve spokesman talked remotely with reporters at the Pentagon Thursday from Baghdad.

"The fight in Raqqa is going well, but we know there will be tough days ahead," he said. "However, I'm confident our partner forces are up to the task."

After months of the prolonged U.S.-backed offensive, ISIS is in retreat in Syria and Iraq, according to Anderson.

"They're certainly on their last legs in Mosul," he said. "I think in general, they are. We can feel it. The pressure has been pretty relentless on them."

Anderson said the news has been especially encouraging in Iraq.

"The Iraq security forces have pushed into the final 500-meter pocket of ISIS, held ground in the old city. Iraqi forces are within sight of Tigress River from the West, and are facing an enemy on its absolutely last legs. The liberation of Mosul rids Iraq of ISIS, and sets conditions for political reconciliation."

Anderson said he expects ISIS's pocket of territory in Mosul to be gone by next week.

Of course, none of this has come cheap. According to Defense Department, since the beginning of Operation Inherent Resolve in August 2014, the total cost has been $13.1 billion and the average daily cost is $13.2 million for 997 days of operations.