Spearmen

n. person armed with a spear; warrior armed with spear

(pl. )
of Spearman
  

Footsoldiers, generally not of the knightly class, armed with a pike or spear , generally arranged into dense formations. These soldiers, when disciplined, were a potent defense against the heavily armoured cavalry , particularly where missile weapons were scarce or where the field could be restricted, such as in the Swiss or Greek mountains (the swiss pikemen of the 16th century were as renown as their predecessors in the Greek Phalanx had been two millennia before). 

(Acts 23:23) These were probably troops so lightly armed as to be able to keep pace on the march with mounted soldiers.
  

MILITI ASTATI. SOLDATI ARMATI DI PICCA. PICCHE