When a long time ago, some countries in Europe were in a difficult period called "interwar", that means between wars. They were trying to recover from the first big war that hurt so many people.
Sadly, some people got scared and worried that things weren't going well, so they decided to take control and be the leaders of the countries. These people were called dictators, and they wanted to have all the power and control everything.
They created a type of government where only they could make decisions without asking anyone else. They also used force and violence to suppress anyone who didn't agree with them.
Some of these dictators were Adolf Hitler in Germany, Francisco Franco in Spain, and Benito Mussolini in Italy. They made people believe that they were going to solve all the country's problems and make things better for everyone, but in reality, they were only looking out for themselves.
These dictatorships were terrible for the people living in those countries. People lost their freedom, and many were killed or jailed, especially those who spoke against the dictators. Eventually, these dictatorships led to World War II, which was a horrible war that killed even more people.
So, in summary, during the "interwar" period in Europe, some people became dictators and took control of countries. They wanted all the power and used force and violence to suppress anyone who didn't agree with them. This was terrible for the people living in those countries and eventually led to World War II.