Nineteen sixty-five was one of the most dynamic and groundbreaking years in rock music history. The Beatles, Rolling Stones, the Who and the Yardbirds continued their assault on the U.S. with a series of significant releases and highly touted tours. The Grateful Dead, the Doors and Pink Floyd all played their first shows together. And Bob Dylan set down the acoustic guitar and began one of the most celebrated periods of his career. All those moments and many more make up our list of the 50 most important events to happen in rock music in the year 1965.