What event has been an important cause of the surge of immigration to European countries such as Germany since the beginning of the 1990s?

Question

Quizplus · Accepted Answer

The collapse of the Soviet Union in 1991 triggered political and economic upheavals in its satellite states, leading to a surge of immigration to European countries such as Germany. Many people from Eastern Europe sought new opportunities and better living conditions in Western Europe, leading to increased migration flows.

What Event Has Been an Important Cause of the Surge