Meet up with your Native friends because it's time to track down Braddock. When you get there, you'll get a quick introduction to the tribes taking part in this. After the cut scene, you'll be let loose not far from a patrol camp. Surrounding the patrol camp are shrubs that you can make your way through pretty easily. You need to kill two of these enemies without starting a fight. If you go along the right side, you should be able to find an enemy who actual patrols right into the shrubs. Make him your first kill and if you alert someone, retreat. Return later and there is a pile of leaves beyond these shrubs that you can hide in to get another patrol. With the two of them down, finish of the rest however you like. Just take your time, be careful, and don't go too far or you'll lose synchronization.
With your uniform in place, you'll hop on a horse and meet up with the rest of Braddock's expedition. Go through the expedition and find your way to Braddock's side. After confronting him, he'll try to get away. You'll have to chase after him on horseback while destroying three wagons filled with explosive barrels. Something that isn't readily apparent normally is that your weapon won't fire (or even be raised) if your target is too far out of range. What you want to do is only use the auto target system and try to shoot at the barrels as you pass them. Be sure to keep a decent distance however or you will be blown up with the barrels.
Ride forward and when you see the first set of barrels highlighted ahead, start to take the path slightly left as you shoot at it with the auto-aim. Continue along this left path chasing after Braddock and it will take you through some trees. When you come down the hill and hit the next road, you'll see more red coats and the next set of barrels will be right behind them. Like before, ride just off the left side of the road because the barrels are on the right and shoot the barrels as you pass.
Follow the road the rest of the way down the hill and through the small valley as you chase after him. When you come out of the valley, the road will crest before going back downhill again. Just after the crest will be another set of barrels on the left side. Hug the right side of the road and shoot them as you pass. From this point on, it's just a simple chase after Braddock. Keep after him until he gets dismounted from his horse.
When you regain control, you'll have to run after Edward through the woods. Keep going until he hits the water. Go after him but at this point, you should be able to hit him with a pistol shot. Try and draw your pistol on him and if you can, shoot him to end your chase.
Finally, when you regain control, make your way into Boston and back to the Green Dragon to end the sequence.
