During the period of the crusades, warfare between christians and muslims lasted nearly

During the period of the crusades, warfare between Christians and Muslims lasted nearly 200 years.

Explanation:

The crusades were a series of military campaigns promoted by the Pope and carried out by much of Christian Europe, mainly by France and the Holy Roman Empire. The crusades, with the initial specific objective of restoring Catholic control over the Holy Land, were fought over a period of almost two hundred years, between 1096 and 1291. Later, other campaigns in Spain and Eastern Europe, of which some did not see its end until the fifteenth century, received the same rating.

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jim crow laws were enacted in northern states.

he is known for discovering   the fossil of a female hominin australopithecine   known as "lucy" in the afar triangle region of hadar, ethiopia.

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