World War I and World War II were significant periods in Black history, as African Americans played important roles in both conflicts despite facing discrimination and segregation within the armed forces and society at large.

During World War I, approximately 350,000 African Americans served in the U.S. military. They were largely relegated to labor battalions and support roles due to racist attitudes prevalent at the time. However, the wartime experience exposed many Black soldiers to new ideas and opportunities, contributing to the growth of the African American civil rights movement in the post-war years.

In World War II, more than one million African Americans served in the armed forces, with notable units like the Tuskegee Airmen and the 761st Tank Battalion earning praise for their bravery and achievements. The war helped to highlight the contradictions of fighting abroad for freedom and democracy while facing segregation and discrimination at home, leading to increased activism and demands for civil rights upon their return.

Overall, the experiences of Black Americans during the World Wars were pivotal in furthering the cause of civil rights and equality in the United States, as they recognized their contributions to the nation's defense and sought to secure their full rights as citizens.