Which of the following conflicts raised the most similar concerns about the violation of civil rights as did World War I?

The American Civil War raised concerns about the violation of civil rights that were similar to those experienced during World War I. During World War I, issues surged regarding civil liberties such as freedom of speech and assembly, particularly in connection with the Espionage Act and the Sedition Act, which restricted anti-war sentiments and dissenting voices. Similarly, the American Civil War involved significant civil rights issues, particularly with regard to the treatment of African Americans, both enslaved and free, and the measures taken by the government that often prioritized wartime security over individual rights.

During the Civil War, the suspension of habeas corpus and the imposition of martial law resulted in the curtailment of civil liberties for many citizens, mirroring the kind of rights violations that Americans faced during World War I. The climate of fear and suspicion surrounding both conflicts prompted the government to limit freedoms under the justification of national security, reflecting a pattern of civil rights being compromised in times of war.