Answer:
One of the most significant impacts of World War One was huge advances in technology, which would transform the way that people all around the world travelled and communicated, in particular, in the years after the conflict. New weapons and technologies were developed and used that led to more destruction than any war had seen in the past.
Explanation:
They did most of the labor for plantations and other lines of work, for free. This saved a lot of money on labor for the colonies.
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They were facing threats from German Vikings
Answer:
The development of space travel, and Nuclear warfare.
Explanation:
Development of rockets wasn't the only thing that helped further thinking of the major superpowers. It also further develop Nuclear Warheads, which resulted in the Cuban incident.