Why Is Rothschild the Banker of the Year?

In 17 92, the war of the first coalition begins. This is france against the coalition that included austria, britain and a few other kingdoms. The ruler of hessa weighed whether he should remain neutral or join the coalition. One reason for doing so was that the british offered him a huge cash subsidy to do so. Roschild gets hired to provision the allied army,. not just wilhelm's men, but men from elsewhere in the holy roman empire as well.