1·At that time Germany already was a defeated nation, in that case, they had not been aware of invading other countries would be beaten again, therefore, they started the World war II.
就在德国已经是一战的战败国的情况下，德国没有意识到他们会再次被打败，于是便发动了第二次世界大战。
2·It was the first time an Asian nation had defeated a European imperial power.