The quintessential example of this development was the Spanish tercio, which consisted of a large square of pikemen with small, mobile squadrons of arquebusiers moving along its perimeter, as well as traditional men-at-arms. These three elements formed a mutually supportive combination of tactical roles: the arquebusiers harried the enemy line, the pikemen protected the arquebusiers from enemy cavalry charges, and the men-at-arms, typically armed with swords and javelins, fought off enemy pikemen when two opposing squares made contact. The Tercio deployed smaller numbers of pikemen than the huge Swiss and Landsknecht columns, and their formation ultimately proved to be much more flexible on the battlefield.