until the 1860s. Historians estimate nearly one million in total took part in the forced migration of this new "Middle Passage". The historian Ira Berlin called this forced migration of slaves the "central event" in the life of a slave between the American Revolution and the Civil War, writing that whether slaves were directly uprooted or lived in fear that they or their families would be involuntarily moved, "the massive deportation traumatized black people". Individuals lost their connection to families and clans, and many ethnic Africans lost their knowledge of varying tribal origins in Africa. The 1863 photograph of Wilson Chinn, a branded slave from Louisiana, like the one of Gordon and his scarred back, served as two early examples of how the newborn medium of photography could encapsulate the cruelty of slavery. Emigration of free Blacks to their continent of origin had been proposed since the Revolutionary war. After Haiti became independent, it tried to recruit African Americans to migrate there after it re-established trade relations with the United States. The Haitian Union was a group formed to promote relations between the countries. After riots against Blacks in Cincinnati, its Black community sponsored founding of the Wilberforce Colony, an initially successful settlement of African American immigrants to Canada. The colony was one of the first such independent political entities. It lasted for a number of decades and provided a destination for about 200 Black families emigrating from a number of locations in the United States. In 1863, during the American Civil War, President Abraham Lincoln signed the Emancipation Proclamation. The proclamation declared that all slaves in Confederate-held territory were free. Advancing Union troops enforced the proclamation, with Texas being the last state to be emancipated, in 1865. Slavery in Union-held Confederate territory continued, at least on paper, until the passage of the Thirteenth Amendment in 1865. While the Naturalization Act of 1790 limited U.S. citizenship to Whites only, the 14th Amendment (1868) gave Black people citizenship, and the 15th Amendment (1870) gave Black males the right to vote (which would still be denied to all women until 1920). Reconstruction era and Jim Crow African Americans quickly set up congregations for themselves, as well as schools and community/civic associations, to have space away from White control or oversight. While the post-war Reconstruction era was initially a time of progress for African Americans, that period ended in 1876. By the late