What was the goal of the exploration by Francisco Vasquez De Coronado?

Coronado was apparently seeking the legendary "Seven Cities of Gold" which were rumored to exist in the Sonoran Desert in what is now the US Southwest. His expedition from 1540 to 1542 was mostly fruitless, but he did subjugate some of the Zuni Indians, and explored as far as the Great Plains and what is now northern Texas.