A reaction in the Catholic Church, triggered by the Reformation, that sought change from within and created new monastic and missionary orders, including the Jesuits (founded in 1540), who saw themselves as soldiers of Christ.

Trento Council.

Explanation:

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In 1545, Pope Paul III convened a council in the city of Trento, Italy, to clarify some aspects of Catholic doctrine. Between 1545 and 1563, the council developed in an interrupted manner.  There were 25 meetings, which were preceded by three different popes.

Trento Council strengthened the ecclesiastical hierarchy, reaffirmed the validity of the 7 sacraments and claimed the annual feasts in honor of the saints and the celebration of liturgical rites

The council accentuated the division of Christianity, as it deepened the differences between the beliefs of Catholics and Protestants.

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the anwser is missions