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It is absolutely vital for historians to understand the cause and effect relationship between events in history because this helps to explain why the events happened in the first place
In August 1945, the US dropped atomic bombs over Japanese cities, Hiroshima and Nagasaki. Hope this helped!
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Harsh discipline from management, low pay, and lack of job security.
I believe, "Tanks were a fast and reliable means of transporting soldiers" is NOT true.
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Space exploration led to advances in many fields. Some include the telecommunications, micro-technology, computer science and the solar power. It started the efforts of lauching space devices and competitive countries were able to send space probes to places like the moon and even Venus.