20th century research and practice of science led to advancement in the fields of communication, engineering, travel, medicine, and war. 20th century The 20th (twentieth) century was a century that began on January 1, 1901 and ended on December 31, 2000. It was the tenth and final century of the 2nd millennium. It is distinct from the century known as the 1900s which began on January 1, 1900 and ended on December 31, 1999. The 20th century was dominated by a chain of events that heralded significant changes in world history as to redefine the era: flu pandemic, World War I and
New Jersey in the 20th century New Jersey in the 20th century New Jersey in the twentieth century underwent many changes. New Jersey's position along the Atlantic Ocean made it a prominent part of both of the World Wars. Despite rising in the Roaring Twenties, New Jersey's economy slowed with the start of the Great Depression. It also became a site for Nike missile batteries during the Cold War. In the 1960s, several race riots occurred following the start of urban decay. Through the 1970s, urbanization increased again, and these problems slowed down. The Standard Oil Company of New Jersey was a large integrated oil producing,