Hamilton Fish was an American politician and statesman who served as the 16th governor of New York from 1849 to 1850, a United States senator from New York from 1851 to 1857, and the 26th U.S. secretary of state from 1869 to 1877. Fish was the most trusted advisor to President Ulysses S. Grant and recognized as the pillar of Grant's presidency. He is considered one of the nation's most effective U.S. secretaries of state by scholars, known for his judiciousness and efforts towards reform and diplomatic moderation. He settled the controversial Alabama Claims with the United Kingdom, developing the concept of international arbitration and avoided war with Spain over Cuban independence by coolly handling the volatile Virginius incident. He also organized a peace conference and treaty between South American countries and Spain. In 1875, Fish negotiated a reciprocal trade treaty for sugar production with the Kingdom of Hawai'i, initiating the process which ended in the 1893 overthrow of the House of Kalākaua and statehood. Fish worked with James Milton Turner to settle the Liberia-Grebo War in 1876.

The presidency of Ulysses S. Grant began on March 4, 1869, when Ulysses S. Grant was inaugurated as the 18th president of the United States, and ended on March 4, 1877. The Reconstruction era took place during Grant's two terms of office. The Ku Klux Klan caused widespread violence throughout the South against African Americans. By 1870, all former Confederate states had been readmitted into the United States and were represented in Congress; however, Democrats and former slave owners refused to accept that freedmen were citizens who were granted suffrage by the Fifteenth Amendment, which prompted Congress to pass three Force Acts to allow the federal government to intervene when states failed to protect former slaves' rights. Following an escalation of Klan violence in the late 1860s, Grant and his attorney general, Amos T. Akerman, head of the newly created Department of Justice, began a crackdown on Klan activity in the South, starting in South Carolina, where Grant sent federal troops to capture Klan members. This led the Klan to demobilize and helped ensure fair elections in 1872.