Advances in radar and mine detection technology.
Moreover, Alliances are formed for various reasons, such as the need for financial or military support, trade agreements, investments or loans. Alliances became strong in the early 19th century when European states either wanted to support the French dictator Napoleon Bonaparte or to defeat him.
You can learn about this at:
brainly.com/question/8320685#SPJ4
Although the conflict divided tribes and villages, the war also saw the first extensive multi-tribal resistance to European colonization in North America and was the first war between Europeans and American Indians that did not end in complete defeat for the American Indians.
B. Back then slaves were very “useful”
Answer:
The Civil War and Reconstruction period
Explanation:
Japan's military decreased and industrial economy increased.