Victory over ISIS has come at a tremendous cost for America's Kurdish and Arab allies in Syria.
More than 11,000 Syrian Democratic Forces fighters were killed and 21,000 others wounded fighting ISIS, the group announced on Saturday following the group's formal liberation of ISIS' last enclave in Syria.
The ISIS caliphate is still not dead.
White House spokeswoman Sarah Sanders told reporters on Friday that the Pentagon "made the call" that ISIS had lost all of its former territory in Syria, according to a White House press pool report.
"When we asked if the caliphate was 100 percent eliminated, Sanders repeatedly said, 'Yes,'" the pool report says.