Final answer:
The Parthians likely fed their horses alfalfa for its nutritional content to ensure they were strong and large for military use.
Step-by-step explanation:
The Parthians, notable for their skilled cavalry, needed strong and large horses for military purposes. As part of their horse's diet, they likely fed them alfalfa, as mentioned in the provided information. Alfalfa was a key feed for horses due to its high nutritional content, which supported the growth and strength needed for these animals in combat and other tasks during ancient times.
Importance of Alfalfa in Horse Diet
Alfalfa, being rich in nutrients, vitamins, and minerals, makes it an excellent feed for horses, promoting muscle growth, stamina, and overall health. This would have been essential for ensuring the Parthian cavalry had strong and resilient horses ready for the rigors of battle and the daily tasks required by the ancient Persians and Mongols, who both highly valued the role of horses in their military and cultural practices.