Respuesta :
Answer:
Poland, Germany is the correct answer.
Explanation:
The instability left in Europe due to the first world war led to Second World War. It broke out two decades later. Germany was rearmed when Adolf Hitler and his national socialist party came to power. The second world war began when Hitler invaded Poland on September 1939. After this, Great Britain and France declared war on Germany. During the war 45-60 million people were killed, In German concentration camps, 6 Million Jews were also killed.