Volleyball was invented in 1895 by William G. Morgan as a less strenuous alternative to basketball for older men. It involved hitting a ball over a net using hands. The game became popular in schools and the military. Major rule changes in the early 20th century and standardization led to widespread acceptance. Key skills in volleyball include serving to put the ball in play, digging/passing of hard-driven attacks, and fundamental underhand, overhand, and sidearm serving techniques.