The United States had to face several challenges in redefining the union after the war. Two main problems were: how to deal with the Southern states that were still angry for losing, and what they should do with the ex-slaves. It was difficult to get American together after many people died in the Civil war and big part of the South was destroyed by the battles.
Apart from that, they had other challenges such as: building a solid economy, creating a stable political system, preserving the national independence (reducing conflicts with other nations and the nation itself), fostering American shipping, consolidating public support, reducing debts, etc.
President George W. Bush I think.
The graphic above represents people and events from which era -revolutionary
The Freedmen's Bureau was an program to help former black slaves and poor whites aftermath the Civil War. On March 3, 1865 was established the programa initiated by the U.S President Abraham Lincoln. The program provided food, housing, medical aid, schools and legal assistance. Was an temporary agency to last one year after the war. The power of the program were expanded to help African Americans to find their family members whom they lost during the war. Beside that they learn to read and write. In summer of 1872 because of a pressure from white Southners the Congress dismantled the Freedmen’s Bureau.