As immediate result of the civil war

Most of the immediate effects were the end of Slavery, but this was superseded with Sharecroppers. Sharecropper’s were freed African-American’s who rented land from a old plantation owner, and the Owner got a share of the crops. This system kept African-American’s in poverty, not really improving their situation by much. Another was the Union Army during reconstruction garrisoning the old south. A little later, during the Spanish-American war, Confederates were allowed to join into the U.S. Army.

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a change of venue is the legal term for moving a trial to a new location. a change of venue request because venue is improper means that the removing defendant believes that the case may not be in that venue because it is improper under procedural rules.