Desegregation in Black history refers to the process of dismantling the system of racial segregation that existed in the United States, particularly in the South, during the Jim Crow era. This system enforced the separation of African Americans and white Americans in public facilities, schools, transportation, housing, and other aspects of life.

One of the most significant moments in the desegregation of Black history was the landmark Supreme Court case Brown v. Board of Education of Topeka in 1954. The ruling declared that the segregation of public schools based on race was unconstitutional, overturning the "separate but equal" doctrine established in the 1896 case Plessy v. Ferguson. This decision paved the way for the gradual desegregation of schools across the country.

Another crucial event in the desegregation of Black history was the Montgomery Bus Boycott in 1955-1956, sparked by Rosa Parks' refusal to give up her seat to a white passenger on a segregated bus. The boycott, led by civil rights leaders such as Martin Luther King Jr., eventually led to a Supreme Court ruling that declared segregation on public buses unconstitutional.

Throughout the 1960s, the Civil Rights Movement gained momentum, with activists organizing protests, marches, and demonstrations to challenge segregation and demand equal rights for African Americans. The Civil Rights Act of 1964 and the Voting Rights Act of 1965 were major legislative achievements that aimed to end segregation and protect the voting rights of Black Americans.

Desegregation was a long and arduous process that faced significant opposition and resistance from those who wanted to maintain the status quo of segregation and white supremacy. Despite these challenges, the efforts of civil rights activists and the victories won through legal battles and grassroots organizing helped to dismantle the system of segregation and advance the cause of racial equality in the United States.