sentences:  The vassal strata have traditionally paid an annual "tiwse", or tribute to the nobles as a part of their status obligations, and also hosted any noble who was traveling through their territory.In the late Medieval era, states Prasse, the previously existing weapon monopoly of the nobility broke down after regional wars took a heavy toll on the noble warrior strata, and thereafter the vassals carried weapons as well and were recruited as warriors.After the start of the French colonial rule, which deprived the nobles of their powers over war and taxation, the Tuaregs belonging to the noble strata disdained tending cattle and tilling the land, seeking instead soldiering or intellectual work.