Well, it can't be the Cuban missile crisis, that was before he was president, he was the vicepresident.
the bombing of Japan happened about 20 years earlier.
He did sign the Civil Rights act into Federal Law, and that was very significant.
CAPITALIST
DESCRIBES ABOVE STATEMENT
Answer:
Found this off of google, "Assigned the task of locating the fabled Seven Cities of Cíbola in the New World for Spain, Francisco Vásquez de Coronado, governor of the New Galicia province of New Spain (present Mexico), left Compostela in February 1540."
Hope this helps, have a great day and stay safe! :) :D :3