Complex sentence: In 1890, the French, allied with the Bambara, entered Ségou, and Ahmadu fled to Sokoto in present-day Nigeria, marking the effective end of the empire.
Split into simpler sentences: In 1890, the French, allied with the Bambara, entered Ségou. Ahmadu Tall fled to Sokoto in present-day Nigeria, marking the effective end of the empire.