How do you assign soldiers to missions in Metal Gear Solid peacewalker

Ok. After you get somewhat into the main portion of the storyline a thing called Outer-Ops becomes available to you. To assign a mission to a soldier you have to go into Outer-Ops. You will be able to select any soldiers in the battle group (no mess hall, R&D etc etc) Select as many as you want along with any vehicles you've captured in the story or extra ops