The correct answer to this open question is the following.
Although there are no options attached, we can comment on the following.
If we are talking about the specific period of time of 1200 to 1450, the best example could be the Mali Empire in Africa.
The Mali Empire started in 1240 and ended in 1645 CE. It was Sundiata who made the decision to centralize the government, developed a great army, and established the presence of Islam in the Empire, which intermingled with previous African religious beliefs. It was Mansa Musa who took the empire to new levels of development, controlling the trade routes of the time and increasing the power and presence of the Mali Empire.
