Complex sentence: That was a big mistake by an otherwise illustrious king of the all powerful Ashanti who were known for their mastery of the art of war and, cerebral style of fighting methodology which involved overwhelming the opposing nation with sheer numbers and, demanding they surrender.
Split into simpler sentences: That was a big mistake by an otherwise illustrious king of the all powerful Ashanti who were known for their mastery of the art of war and, cerebral style of fighting. The Ashanti during that period used a methodology which involved overwhelming the opposing nation with sheer numbers and, demanding that they surrender.