Why was Duke Ellington considered one of the world’s greatest jazz
composers

Im pretty sure its 1940

Leading and anchoring his ever-evolving band for half a century, Ellington showed how the American Orchestra could achieve a perfect balance of music that was both shaped by the composer while also birthed on the spot by the musicians, while also creating art that swung relentlessly while also achieving the heights of emotional engagement. Each of his compositions—which began to number in the thousands—was crafted to bring out the finest talents of the extraordinary individuals who traveled the road with him, and indeed the Duke Ellington Orchestra developed one of the most unique and instantly recognizable musical thumbprints of any ensemble..

Explanation:

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.