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Because the poor semi united clonists were completely united in the vision of being free from the most powerful nation in the world. Perhaps, more importantly, the most powerful nation in the world made the most powerful mistake that can be made - never underestimate your adversary. Underestimation of the abilities of the other has been the downfall of every empire since the dawn of time, and may I add, quite a few over confident fellows as well.
The United States emerged from World War II as the richest, most powerful nation on Earth.
Portugal
After the first world war the USA became the most powerful one.
America is the most powerful nation in the world and will be for centuries to come all because of our diverse population and culture alone
scotland
Luck and willpower.
The Roman Empire was an enomously powerful nation at the time and would even be considered a world power today if it existed.
Because the more land you owned the more powerful you were!!!
The United Kingdom of Great Britain and Ireland were the most powerful. They had the largest GDP in the world, a huge industry and the largest Empire in world History
Germany
Yes, that's how the United States defeated Japan by the end of World War 2. The United States are powerful enough to defeat Japan.