The Viet Cong (or VC) no longer existed as a fighting force in 1970 ( the setting of the episode's flashbacks). The group was destroyed as a functioning unit falling the Tet Offensive in 1968.
The "general" is in question would not be be a member of the Viet Cong.
The "general" is in question would not be be a member of the Viet Cong.
West Texas has mountains. However they don't look like the mountains of Southern California.
The series is set in Texas, but was obviously filmed in Southern California.
When Carlita and Harris get out of their car at Titan in Washington, DC, the viewer sees brown, bare hills with sagebrush behind them. DC is on a coastal plain with no significant hills within two hours, and there are no dry mountains within 1,500 miles of DC.