After World War I, the United States of America emerged as the richest country in the world. The war was fought between 1914 and 1918.
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Germans
The British Royal Navy.
America was more pereparing for the war 1 and the best !!
Germany mobilized the most troops. yeah Germany ROCKS man! best in the world
Probably not the USA has the best navy in the world or so iv been told. Hope this helped :)