In exchange for land, a knight agreed to be a sort of sub-vassal to a vassal. this agreement was known as investiture summons subinfeudation servitude

it is Subinfeudation. this should be right

i'm not sure i understand what you are trying to ask, if you give more information, that would be most .

americans experinced rations on food and be gangrene their own food and feed their families going to go over jobs that were orginally only for men.