What is important about the progressive dates on the map?

progressive dates on the map are important since they are used to know the exact dates on when the activities took place.

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.