What event in 1095 led Pope Urban II to call Christians to a religious war?

The First Crusades (1095–99).

Explanation:

Pope Urban II promised forgiveness and pardon for all of the past sins of those who would fight to reclaim the holy land from Muslims, and free the eastern churches. This pardon would also apply to those that would fight the Muslims in Spain.

hope i helped

Muslims taking over Jerusalem and the Holy Land

Explanation:

In 1095, Pope Urban II called out to Christians in Europe, telling them that they need to take back the holy land from Muslims that had taken over, leading to the Crusades.

yellow fever and other tropical diseases

the decreasing neutrality of the u. s. in world war i

hope this : )