What major events ended the middle ages?

Monarchs replaced feudal soldiers with national armies made up of hired soldiers. Finally, threats to the monarchy decreased as a result of the large number of nobles killed in the war. Another major factor that contributed to the end of the Middle Ages was the declination of the Church's power over the nation-states.

There were many reasons for the downfall of the Middle Ages, but the most crucial ones were the decline of the feudal system, and the declination of the Church's power over the nation-states.