Hugh IV of Rethel was a nobleman from the 12th century, known for his role as the Count of Rethel in present-day France. He was part of the House of Rethel, a prominent family during the medieval period. His reign was marked by the challenges of feudal politics and the ongoing conflicts of the time. Hugh IV was also involved in the Crusades, a series of religious wars aimed at reclaiming the Holy Land. His participation in these campaigns reflected the era's intertwining of faith and warfare, as many nobles sought to gain land and prestige through military endeavors.