As the Romans expanded their power and influence across the Italian peninsula they established a system of organized rule known as the Roman Confederation. The Roman Confederation consisted of Rome and it's conquered client states, and was signified by domination on the part of Rome. The Confederation was established through treaties with a conquered peoples or kingdoms. Rome allowed the kingdom to retain some freedom, and provided them with some services of the Roman Republic, and in exchange the kingdom provided allegiance in the form of soldiers and tax payments. The treaties included aspects such as Roman citizenship, the ability to marry or make contracts with Romans, or other specialized relationships. The Roman Confederation eventually expanded to encompass all of Italy.