What types of technology were used to help Americans achieve manifest destiny?

Cotton Gin. It increased the production of cotton so more slaves were needed.

Reaper. it increased the productivity for an American Farmer.

Steamboat. It provided faster water transportation.

-helped westward expansion leading to manifest destiny-

answer; i believe that the correct answer is ( troxel v. granville);

nigger, that word was originated for white folks   to keep black people under

and when black people use it, they know that's just how they greet each other

and when white folks use it, they know there's a double meaning under