What associations we're having when we hear the word knight . First of all , we remember the Middle Ages, of which we know from the novels of Cervantes, Walter Scott, and Dumas . They seem to us men in armor and helmet in the armor. On horseback with a spear or sword in hand, they are fighting for knightly tournaments for the honor of the beautiful ladies . Also, we imagine a brave warrior Baron Duke or King leads the huge army of loyal vassals who selflessly go for their leader in the crusade...