Final answer:
Sundiata Keita defeated the Sosso kingdom in 1235, leading to the rise of the Mali Empire with Niani as its capital.
Step-by-step explanation:
Sundiata Keita defeated the kingdom of Sosso in 1235. During this pivotal year, Sundiata consolidated his power over the Mande heartland, leading several small kingdoms in unity against Sosso. He successfully defeated the Sosso kingdom, paving the way for the establishment of the vast and prosperous Mali Empire.
Sundiata's military triumph at the Battle of Kirina marked a significant turning point in West African history. His rule led to an era of wealth and stability, with Niani as the empire's thriving capital.This triumph at Kirina solidified his position as a legendary figure in West African history and set the stage for the expansion and prosperity of the Mali Empire in the following centuries.