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Northerns who moved south during the reconstruction were called Carpetbaggers.
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British mathematician William Bourne made some of the earliest known plans for a submarine around 1578, but the world’s first working prototype was built in the 17th century by Cornelius Drebbel, a Dutch polymath and inventor in the employ of the British King James I. Drebbel’s sub was probably a modified rowboat coated in greased leather and manned by a team of oarsmen. Sometime around 1620, he used it to dive 15 feet beneath the River Thames during a demonstration witnessed by King James and thousands of astonished Londoners. Unfortunately, none of Drebbel’s plans or engineering drawings has survived to today, so historians can only guess about how his “diving boat” actually operated. Some accounts say it submerged via a collection of bladders or wooden ballast tanks, while others suggest that a sloping bow and a system of weights were used to propel the boat underwater when it was rowed at full speed.
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Answer:
Civil rights movement
Explanation:This movement changed history forever. This movement showed a peaceful protest . African americans finally gotten the same rights as white people. This has shown the whole country that african americans are equals and should be treated as such.
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Admiral Zheng He navigated to present-day Madagascar and helped to expand the Chinese empire into Africa.
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Answer: : The Battle of Britain is important because it was one of the pivotal points of the war, much like Stalingrad or Midway, it effectively halted Hitlers advance in the west and denied Hitler
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