I WONDER - What Did Knights Do?

Knights were the elite force in medieval battles, known for their prowess in close combat and significant roles in major conflicts like the Crusades and the 100 Years War. Their tactical use often influenced battle outcomes. However, the rise of long-range weapons such as the English Longbow and firearms led to the decline of traditional knighthood by the end of the Middle Ages.

What advancements in weaponry contributed to the decline of traditional knighthood?

By what time period did the decline of traditional knighthood occur?