Complex sentence: An eye-witness counted more than 28 towers constructed of about 1,500 heads each.This has been described as a "systematic use of terror against towns... an integral element of Tamerlane's strategic element" which he viewed as preventing bloodshed by discouraging resistance.
Split into simpler sentences: An eye-witness counted more than 28 towers constructed of about 1,500 heads each. This style of massacre has been described as a "systematic use of terror against towns... an integral element of Tamerlane's strategic element" which he viewed as preventing bloodshed by discouraging resistance.