The "Soviet-era" refers to the period when the Soviet Union existed, from 1922 until its dissolution in 1991. This era was marked by a one-party state governed by the Communist Party, which aimed to create a classless society through state control of the economy and collective ownership of resources. During this time, the Soviet Union became a major global power, engaging in the Cold War with the United States and influencing many countries worldwide. The era is also known for significant achievements in science, technology, and culture, including the launch of Sputnik, the first artificial satellite.