Why were the Mongols feared throughout Asia and Europe?

The Mongols were feared throughout Asia and Europe due to their exceptional military organization, innovative tactics, and the psychological warfare they employed. Their swift horseback archers and ability to adapt to various combat situations allowed them to conquer vast territories rapidly. Additionally, the Mongols instilled terror by employing brutal methods, such as mass executions and the destruction of cities, which served to dissuade resistance. This combination of military prowess and ruthless reputation contributed to their fearsome legacy across continents.