Final answer:
The Salzburgers were the group that arrived to help with the yellow fever crisis in the colony of Georgia.
Step-by-step explanation:
The group that arrived to help with the yellow fever crisis after the colony of Georgia was established was the Salzburgers. The Salzburgers were a group of about 300 German-speaking Lutherans who had been expelled from the principality of Salzburg in modern Austria. They settled in Georgia and proved to be an important and successful group in the colony.