Fill in the Blanks ABOLITIONIST MOVEMENT IN USAOnline version A brief history of the abolitionist movement in the USA. by Alfonso Poza 1 safe soldiers escape rights abolished Underground plantations Amendment abolitionists vote ignored Many based their activism on the belief that slaveholding was a sin ; others thought that slaveholding was regressive , inefficient and made little economic sense . Antislavery northerners had begun helping enslaved people from southern to the North via a network of houses , later known as the Railroad . People like Harriet Tubman guided escapees on their journey North . During the Civil War some 186 , 000 Black joined the Union Army , and about 38 , 000 lost their lives . The 13th , adopted on December 18 , 1865 , officially slavery . Former enslaved men and women received the of citizenship and the " equal protection " of the Constitution in the 14th Amendment and the right to in the 15th Amendment , but these provisions of Constitution were often or violated , even threated by the rise of racist organizations such as the Ku Klux Klan ( KKK ) .
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