In 1963, the band took Europe by storm, and by 1964, they had captivated America. Their revolutionary global tours forever altered youth culture worldwide and, arguably, laid the foundation for modern mass entertainment. During this time, the group was also busy creating and recording a string of highly successful singles and albums. However, the overwhelming pressure of their unparalleled fame, which spiraled into chaos by 1966, prompted them to cease touring. In the years that followed, The Beatles were able to concentrate on producing a series of albums that transformed the landscape of recorded music.