31-The 13^th amendment was ratified by the congress on ________ after the conclusion of civil war.

December 6, 1865

32-Equal civil and legal rights to African Americans and freed slaves have been granted by the _________ amendment to the US Constitution.

14^th

33-Congress ratified 14^th amendment in ____________.

1868

34-The right of vote to African Americans was given in _______ by the adaptation of _________ amendment.

1870, 15^th

35-The first steam boat known as ________ was introduced by ___________ and _________ in ________ on the _________ River.

Clermont, Robert Fulton, Robert Livingston, 1807, Hudson

36-US and Mexico signed the Treaty of ___________ in ______________.

Guadalupe Hidalgo, 2 February 1848

37-The American Civil War started in _______ and ended in ________.

1861, 1865

38-The American civil war lasted for __________ years.

Four

39-The Kansas-Nebraska Act was passed by the Congress in __________.

1854

40-The Civil War of 1861-65 led to over __________ casualties.

618,000