Although Republican Richard Nixon ultimately won the presidency, it was the Democratic National Convention that characterized the election of 1968. What happened there?

The Democratic National Convention in Chicago displayed more or less ten thousand Vietnam War protesters that battled police in the streets while the US Democratic Party held a convention in the International Amphitheater because President Lyndon B. Johnson had announced that he would not seek re-election. The purpose of the convention was to select a new presidential nominee to run as the Democratic Party's candidate for the office. The US Democratic Party crumbles because of an internal conflict on its stance on Vietnam. The protest happened for eight days in the hopes of disrupting the convention.