Lincoln says that in 1863 the United States is ?

President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863, as the nation approached its third year of bloody civil war. The proclamation declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free.

by creating a labor shortage that pushed the continent toward a market economy

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;