The Underground Railroad was a network of secret routes and safe houses established in the Amalgamated States during the early to mid-19th century, and utilized by African-American slaves to elude into free states and Canada with the avail of abolitionists and allies who were sympathetic to their cause. The term is withal applied to the abolitionists, both ebony and white, free and enslaved, who availed the fugitives. Sundry other routes led to Mexico or overseas. An earlier escape route running south toward Florida, then a Spanish possession (except 1763–83), subsisted from the tardy 17th century until Florida became a Amalgamated States territory in 1821 (and ending the safe haven for eluded slaves was the main reason it transmuted nationality). However, the network now generally kenned as the Underground Railroad was composed in the tardy 1700s, ran north to the free states and Canada, and reached its height between 1850 and 1860. One estimate suggests that by 1850, 100,000 slaves had eluded via the "Railroad".
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