Walkthrough for And You Will Know the Truth of Red Dead Redemption.
1. Go to G mark in the Map to meet Agent Edgar Ross at the Blackwater (Great Plains).
2. When you get the open fire order, kill everything in your sight.
3. Mount up your horse and go to the Yellow Dot.
4. Kill everyone in Dutch's army.
5. Keep going forward and enter the village. Kill everyone here too.
6. Protect the soldiers while they are opening the gate.
7. Kill his guards and then hit the light in his left.
8. Follow Dutch.