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.
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I believe the answer is c.1920. However, I could be wrong.
<span>Cesare Beccaria believed that swift and timely punishment would have greater influence on people's motivation to obey laws. He believed the punishment should be equal to the harm done as in an eye for an eye. Though oddly he disagreed with the death penalty.</span>