Harriet Tubman: the first African-American on U.S. currency

This file photo taken on April 29, 2015 shows an image provided by the 'Women On 20's' organization featuring abolitionist Harriet Tubman on the U.S. twenty dollar bill. Celebrated former U.S. slave Harriet Tubman will replace President Andrew Jackson on the $20 banknote, the first time an African-American has been featured on US money, a Treasury official said April 20, 2016

Harriet Tubman, born into slavery in the early 19th century, escaped and used the network of antislavery activists and safe houses known as the Underground Railroad to transport other slaves to freedom. After the Civil War, Tubman, who died in 1913, became active in the campaign for women's suffrage. Last year, the US treasury announced plans to replace Alexander Hamilton, the nation's first secretary of the treasury, on the $10 bill with a woman.

Tubman escaped slavery but then returned to the South to lead other slaves to freedom 

Later determined to keep Hamilton after both Hamilton supporters and women's groups championed for the $20 bill to be changed to incorporate a woman instead.