Answer:
exile (political migration)
scientists
Explanation:
The greatest migration from skilled scientists and artists, as well as writers, came in 1933 when Nazis came to power and occurred until 1945 when the freedom to relocate was hindered.
A wave of German scientists migrated in bordering or European countries, for seeking freedom mainly in the political realm. And fearing that the Nazi regime would continue to establish as a totalitarian state, they began to criticize the regime clandestinely in the countries they settled.
Many were to Czechoslovakia, France, Switzerland and the Netherlands, because going to the US initially was seen as a more compromised way of no return.
However when the situation worsened in Europe most migration of political refugees came to the US, where a huge cultural transfer took place
The well-known example of Einstein :
In 1933, Einstein was visiting the United States, Adolf Hitler rose to power. Having a Jewish background, Einstein never went back to Germany. He settled in the United States and became an American citizen in 1940.
