Chechnya is a country in central Asia.
Adam Wexler leaked secrets of the Central Intelligence Agency and fled to Chechnya. The CIA tracked him down and delivered a weaponized form of the M5-10 which was designed to become inert after a very short time. While Cole was talking to Cassie by cell phone, the CIA zeroed in on the location and destroyed it with a missile to avoid its spread. Cassandra Railly visited Chechnya to verify that Cole had not been left alive.
When Katarina Jones attempted to recover Cole, there was a power failure and Cole ended up in 2017. He made his way to the nearest town. He encountered U.S. forces and was evacuated to the U.S. By the end of 2017 Chechnya is nearly extinct with a less then 10 remaining