Wiktionary
tercios
n. (plural of tercio English)
Usage examples of "tercios".
The minute those clumsy tercios try and get out of the gate the Magyar are going to charge from both sides.
Well-protected batteries lay emplaced in positions from which they could inflict a deadly crossfire upon the ranks of an advancing enemy, while twos and threes of light cannon were interspersed among and between the tercios of pikemen and musketeers, all along the front.
English lines, though little could be seen save black, flame-shot smoke eddying about and among the tercios on a gentle breeze.
I suppose that our tercios would fare as poorly as the horse, were we to attack.