The group stormed Europe in 1963, also in 1964they conquered America. Their world tours that were groundbreaking changed worldwide youth culture and, possibly, invented entertainment as we know it today. All the time, the group were composing and recording a series of albums and singles. However the persistent pressure of popularity, that in 1966 became uncontrollable turmoil, resulted in the choice to quit touring. From the years The Beatles were free to focus on a series of albums that changed the surface of music.