1773-1779: Black freedom petitions: "For the sake of justice, humanity"
1776-1783: Service for freedom: thousands join British forces
1784: Black Freemasons spur activism, advance abolitionist cause
1832: Maria W. Stewart: Militant abolitionist, women's rights champion
1838-1846: Cooperatives produce fair-labor goods, model shared values
1839: Women's role is key issue in anti-slavery society split
1842: "Under ground Rail-road" promoter transports hundreds to freedom
1843: Abolitionists campaign against segregation, for interracial marriage
1845: Frances Ellen Watkins Harper: Poet, anti-slavery activist
1847: The Crafts: Tireless speakers against slavery after daring escape
1850-1860: Underground Railroad helps thousands secure freedom
1850: Martin Delany: Abolitionist leader, champions Black self-reliance
1851: Sojourner Truth: Activist for abolition, women's rights, prison reform
1862: Lincoln to Black leaders: "Your people should live elsewhere"
1863: Abraham Galloway: Militant activist, Union spy, civil rights leader