Edit the following paragraph by correcting the inconsistent verb tense.

Native Americans long dominated the vastness of the American West. Link culturally and geographically by trade, travel, and warfare, various Indigenous groups control most of the continent west of the Mississippi River deep into the nineteenth century. Spanish, French, British, and later American traders have integrated themselves into many regional economies, and American emigrants push ever westward, but no imperial power had yet achieved anything approximating political or military control over the great bulk of the continent. Then the Civil War come and go and decoupled the West from the question of slavery just as the United States industrialized and lay down rails and pushes its ever-expanding population ever farther west. Make the revisions and submit in the text box below.