How, When and Why Did The Knightly Lance of Medieval Europe fade away? How where they used in Battle?

by CaptainNapoleon
Maklodes

To clarify, by "lance," do you mean the physical weapon (a kind of big spear), or by "lance," do you mean a sort of small military unit whose composition varied with time and place? (e.g., the Burgundian lance, with a man-at-arms, page, costillier, mounted archers, crossbowman, gunner, and pikeman, or the simple knight + squire + page lance of Italy)