Roger de Clifford was a notable figure in medieval England, known for his role as a military leader and nobleman. He was a member of the Clifford family, a prominent lineage in the West Riding of Yorkshire. De Clifford served as a soldier during the Hundred Years' War and was involved in various military campaigns. He is perhaps best remembered for his participation in the Battle of Boroughbridge in 1322, where he fought for the Lancastrian cause against the Yorkists. His actions during this period contributed to the ongoing conflicts between these two factions, which shaped the political landscape of England in the 14th century.