From the Rulebook:
"The Ashigaru (spearman) history is rich in all cultures. Brash, bold, and brave, legendary Ashigaru examples are
the 300 Spartans, Alexander the Great’s Phalanx, American Indians, etc."
The Ashigaru is the basis for most Medival armies. The long spear in formations is a powerful unit, capable of defeating even a calvary charge. They are lightly armored to allow rapid movement on the field.