Sergeant Simpson
Quote 1
"All their men is either in the VIETCONG army or the ARVNs. The ARVNs is the South Vietnamese army, and they suppose to be on our side. The VIETCONG is the enemy. This is like the Civil War," Simpson said. "Sometimes one brother go to the VIETCONG and the other brother go to the ARVN. After a while the brother who fighting with the VIETCONG either gonna get killed or want to leave and join the ARVN." (4.79)
The American Civil War is a pretty good comparison, though it's also a sad one. It shows Perry that the war isn't just tough on the out-of-towners; when the Vietnamese soldiers fight each other, they're sometimes fighting against their own family.