Question

why did Germany lost the war

Answer 1

Germany lost for the same reason Germany started the war, because Hitler was in charge. Speer described Hitler as an incompetent, unprofessional, self-taught layman: "Without any sense of the complexities of any great task, he boldly assumed one function after another

Answer 2

With the entry of US in the World War 2, the war ended with dropping bombs on Hiroshima and Nagasaki and the Central Powers losed the war which consisted of Germany, Italy and Japan