Answer:
1. Loss of almost an entire generation of young men by Europe.
2. Nationalism raised in the colonial empires
Step-by-step explanation:
The First World War leads to destruction of empires. Numerous new nation-states were created. United States were forced to become a world power that in turn lead to the rise of Hitler and Soviet communism.
Effects of world war one are as follows:
1. Loss of almost an entire generation of young men by Europe.
2. Nationalism raised in the colonial empires