HOW do I get the hay box from Assassins Creed?

It is in Main Ops <Abandoned Mining Base> just before fighting guards and Cocoon.
Do the Eagle Dive in certain point to get it.

Like opfer_gv said above yes eagle dive into from a buliding if u finish the mission with it u keep it and can use it on any mission

Actually, the dues above me our right, but just a note, It's not called Eagle Dive. It's called Leap of Faith.

JPN call it "Eagle Dive", no idea why..

They call it eagle dive since the name of altiar or ezio i forgot which one means eagle and he is diving. plus japan gets things with different names like resident evil there is bio hazard so don't question japan no one now why they name things differently but the biohazard thing was because biohazard was copy righted so they named it re here in the states and euro (i am guessing) .

It is in Main Ops <Abandoned Mining Base> , the place before you proceed to the nx area , climb up the ladder and roll pass to the other building's roof , empty one slot in ur item and press the action button when prompt.. you can keep the box now =D

It's pretty easy to get and it takes me some time to figure it out. Take the main ops mission "Travel to the mine base" and head all the way to the next area but don't go there yet. There's one building with a bridge-like for carrying mining stuff and there's a ladder behind it. Climb up and roll to the building on it's left. Climb up again by approaching the the middle and go over to the edge (which you can see the road and miller will tell you about there is a hay below. Press the action button to do the leap of faith and walah, you got the hay box .

actually I got it and the musket from Hideo Kojima. You have 2 chances to find him, one is when your looking for the truck with the nuke(SKIP the truck you know the nuke is in) look into 1 and you will see Kojima and then you will hear a Fulton recovery sound. The other is when you trying to catch that guy escaping for the 5th time i think.

i say do what Liquid_Snail said.

I just remembered, in Assassins Creed, it is called Leap of Faith... But it not a big deal...

EASY. Go on the abandoned mining base mission. Get to the last two buildings. There is a gap. Roll over the gap and go over to this area with straw. There will be the action button icon. To find it acurately, at the very start, follow the path nd you will see the box nd yeah.

What for there is the enemy soldier in that map on bridge in its begining? he actualy asleep and you can see him in binocle, maybe somehow i can climb in?