Resident Evil 6 (Chris Redfield Story)

After the deaths of a number of soldiers under Chris' command at least six months prior in Edonia (The actual date being December 24, 2012) Chris left the BSAA and became a drunken wreck, before being convinced by Piers Nivans to come back and finish his mission to end bioterrorism. Although initially hesitant, Chris reluctantly returns to the organization.
Chris Redfield and the BSAA—including Piers—are soon after sent into a war-torn China, around the coastal Chinese city of Lanshiang.