Before revision: History Before the colonization by the French of the North African and Sahel countries in which they dwell, the nomadic Tuareg federations chose a chief among the wise men of the tribes to rule the loose union of closely related groups.
After revision: History Before the colonization by the French of the Maghreb and Sahel countries in which they dwell, the nomadic Tuareg federations chose a chief among the wise men of the tribes to rule the loose union of closely related groups.