I had originally replied, but it didn't seem to go through properly.
I was browsing through some unwanted textbooks and found the following about the USA, which I thought may be of some interest to you... plus I was bored and I want to boost my post count
"In 1900, the USA had established itself as a major industrial power to rival the pre-eminence of Great Britain. Yet, as a military power it could hardly be taken seriously..."
"It was a different story twenty years later. By the end of WWI the USA had surpassed the major European powers as an economic power."
"The reality that it had long been a player in world affairs, whether it liked it or not, only became fully apparent by the end of WWII in 1945."