Final answer:
The question is about historical archery equipment, with archers using composite bows capable of accurately firing arrows up to four hundred feet.
Step-by-step explanation:
The question refers to the type of equipment used by archers, specifically regarding the type of bow. The archers mentioned were equipped with composite bows, which were highly advanced for their time and capable of firing arrows accurately over a distance of four hundred feet. Composite bows are made from various materials laminated together to improve their strength and flexibility, which increases their range and power. These bows were particularly favored by horseback warriors in various historical periods due to their compact size and formidable force.