An example of a nation that has intervened in the internal affairs of other countries is Russia and formerly the Soviet Union.
Russia is a country in Europe that has stood out for being one of the world powers over the years, especially after the Second World War. At that time this country was called the Soviet Union and it was one of the two world powers that dominated the world along with the United States.
After World War II, the Soviet Union was in competition with the United States for the above, it influenced many countries to get support and maintain control.
Examples of this intervention are Vietnam and Korea, where the influence of the Soviet Union led to the emergence of guerrillas and groups to form socialist countries such as the Soviet Union. On the other hand, China also adopted this ideology led by Mao Tse Tung.
In America, countries such as Cuba and Venezuela have also received the influence of the Soviet Union and Russia respectively in different matters such as the missile crisis and the arms and oil trade.
Learn more about the Soviet Union in: https://brainly.com/question/13963885