1526: First Africans likely brought as slaves to North America revolt
1776-1783: Service for freedom: thousands join British forces
1812-1815: Escapees from slavery help British forces defeat U.S.
1829-1830: Pro-slavery mobs devastate Black Ohio communities
1833 Britain frees 800,000, compensates enslavers
1835 Activists foil kidnappers, help fugitives to freedom
1835-1836: Colonists win Texas independence, protect right to enslave
1837 Wendell Phillips: Powerful voice for abolition
1842: "Under ground Rail-road" promoter transports hundreds to freedom
1842: Sarah Parker Remond: Activist for human rights, women's suffrage
1847: The Crafts: Tireless speakers against slavery after daring escape
1850 Harsher Fugitive Slave Act is part of political deal
1850-1860: Underground Railroad helps thousands secure freedom
1850: Martin Delany: Abolitionist leader, champions Black self-reliance
1854: Wisconsin activists help escapees, challenge Fugitive Slave Act
1862 Congress frees all enslaved people in Washington, D.C.
1862 Republicans build on military wins to pass progressive laws
1863: Abraham Galloway: Militant activist, Union spy, civil rights leader