The United States began to profit during World War I because in a short space of time, European nations needed huge amounts of food and weapons for the conflict. Even though it remained neutral, out of interest and affinity, the US government only exported its products to the nations of the Triple Entente.
The US's solidarity behavior soon deepened, especially when we look at borrowing money for the war in Europe. Until then, the conflict had become a very profitable and beneficial event for the American economy. In the political arena, the United States hoped that the nation could be further strengthened by possibly taking on the status of intermediaries of peace treaties.