Sejry said the U.S. pays his fighters infrequently, claiming they’ve received only a months-worth pay during the last three months.

“We feel betrayed. Now other options are on the table,” Sejry said. [The Russians] said, ‘We are more reliable and trustworthy. Just look how we stood with Assad all this time. And look at the Americans. They are not truthful, they’re not supporting you guys. We’ll be 100 percent with you.’”