Europeans and Asians are always saying that horseshit.
The United States is literally the oldest nation in the world. Only San Marino can claim to be older and not even them because they had a Fascist takeover in the 1940s.
The UK tries to claim 1801, but the fact is they had a demotion of House of Lords in 1911, and the Lords were finally removed from Veto power in 1949, making the UK effectively only as old as the People's Republic of China, which was also formed in 1949.
The Parliment Acts of 1911 and 1949 would be akin to dissolving the US Senate, or in other words completely re-making the US Government into a new nation. So it can be said that the UK is in fact only 71 years old
You're way too generous on 1871 for the Krauts. Germany is 30 years old
Listen up, Noob. The United States is responsible for the existence of Germany. I know European education is poor to be generous, but you used to have a province called East Prussia, which is literally the German heartland, which doesn't exist anymore. It is now called Kaliningrad, after the Soviets ethnically-cleansed East Prussia, moved the border of Germany-Poland East, and re-settled the entire German population. That was the ancient seat of the Junkers, Konigsberg, and the spiritual heart of the Hohenzollerns.
France and Britain wanted to eliminate you and turn you into a province of France. Truman stepped in and shut that talk down. Then the US spent billions of dollars rebuilding your devastated shithole and gave you an Army, rather than annexing all of Western Europe.
Not colonizing Western Europe after WWII is basically unprecedented. Never before has a major power spent so much blood and money to conquer a land and not annexed it. It's literally never happened in the history of humankind.
For that act alone, the US is by far the greatest nation that has ever existed.
If Truman had not intervened, the Soviets would have dissolved East Germany and sent the population east to work in Siberian salt mines. But because Truman pressured them about this, and preserved West Germany, the Soviet bloc had to have their East Germany, so you survived.
You owe your existence to the US. As does China btw.
Ungrateful, ill-educated little turd.