Emancipation Proclamation: An executive order issued by President Abraham Lincoln in 1863, declaring the freedom of all slaves in Confederate-held territory. Civil Rights Movement: A decades-long struggle by African Americans to end racial discrimination and gain equal rights under the law in the United States. Segregation: The enforced separation of different racial groups in a country, community, or establishment. Discrimination: The unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex. Metaphor: A figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable. Nonviolent protest: A method of protest that rejects the use of physical violence in order to achieve social or political change.