The affect of surprise was that the natives Americans enemy wouldn't have time to prepare so the losses/casualties for the enemy would be heavy,also using the element of surprise would also most likely scare enemy soldiers, and they would be distracted and confused as well.
Han rulers.
(From wikipedia)The Chinese traditional historical accounts on the Trưng sisters are remarkably brief. They are found in two different chapters of the Book of the Later Han<span>, the history for the </span>Eastern Han Dynasty<span>, against which the Trưng sisters had carried out their uprising.</span>
Answer:
yes horses are native to America
