The 20th century covers the years from 1901 to 2000. It was a time of major global change in technology, politics, and daily life. Many important events shaped countries and societies during this century.

Two world wars took place between 1914 and 1945, involving countries across the globe. New technologies such as airplanes, cars, and computers became common. Cities grew larger, and communication systems expanded.

The Cold War divided many countries into political groups from 1947 to 1991. New nations formed as empires ended. The 20th century is studied through records, photographs, and global events.