how do you do a stealth assassination in assassin creed 3?

The wheel is a weapon wheel in which you get to select your weapons. To do this mission you need the hidden blades which are at the top of the wheel. Rb to open wheel on xbox ( hold) and I think r1 for ps 3. You just simply walk up behind a redcoats and press x for xbox or square for ps. This just simply stabs them in the back without noise. Though if you do this in the open other guards will find the body and search for you. If you want to hide the body, either press b on xbox or circle on ps to pick the body up and find a haystack or bush to hide it in. You can also assassinate enemies with the assassinate button (again x for xbox square for ps) from a haystack or bush and it will kill the target and automatically hide the body in which every position you are in. Remember that the only thing silent would be to use the hidden blade or subdue them with your fists. ( bottom of the weapon wheel) stealth assassinating must be done in low profile, which means you cannot hold rt or r2 while assassinating, nor can you be detected(red bar over their head)

So doing the actual mission, first run down to the little stream and run to the bushes behind the tents. There will be a guard walking around, just assassinate him from the bush, then free themselves from that area. Next, find your way to the slaves near the wall of the fortress. Remember that you can hide in bushes and haystacks. Try not to kill anyone in groups or out in the open. There will be a haystack near the slaves, hide there and wait for the guard to come by and assassinate him. Free the slaves. Stay close to the wall and avoid the guards. Head for the ship. There should be a stone wall with one or two guards on the pier. If there are two, assassinate the first one at the wall, and the other from behind the cargo at the corner. Then climb onto the side of the ship and climb from the side to the front of the ship. There should be 2 guards there. Those should be easy, just walk up to one and stealth assassinate him and to the other one before you are detected. Free the prisoners and the rest of the mission should be easy.

Sorry if the details are off a little, I haven't played ac 3 in a long time.