Why didJohnny Marks write Rudolph the Red nosed reindeer?

Johnny Marks wrote "Rudolph the Red-Nosed Reindeer" in 1939 as a way to create a holiday song based on a story originally written by his brother-in-law, Robert L. May, for a Christmas promotion at Montgomery Ward. Marks aimed to capture the themes of acceptance and overcoming adversity through Rudolph's journey. The song quickly gained popularity and became a classic, further solidified by the 1949 recording by Gene Autry. Marks' work has since become an integral part of Christmas traditions.