Answer: Congress worked on certain amendments formed by the Union even before the end of the war.
Step-by-step explanation:
Several amendments have been formed for this purpose—the Thirteenth Amendment, which implied the emancipation and abolition of slavery after the war. The fourteenth amendment, which was also passed during the war, provided for the granting of citizenship to all persons born on the United States territory and to naturalized inhabitants of the country. The Fifteenth Amendment is a further effort to create a democratic society. This amendment prohibits the degradation of voters based on skin color during elections.