Daybreak if it has sylvestor Stallone in it and they are trapped in a tunnel.
The Underground Railroad
There was a system of hiding and moving people north to escape slavery, but not a real railroad with a train, rails, and cars.
I'd expect that most people would know this, but it is the Underground Railroad.
The Underground Railroad which was invented in part by Herriet Tubman.
They were collectively known as the underground railroad.
The underground railroad
In the US it was called the Underground Railroad
True.
The system was labeled "The Underground Railroad", but obviously was neither a literal railway, nor technically underground.
The system of secret escape routes that led enslaved people to free lands was called the Underground Railroad. It was a network of safe houses, abolitionists, and hidden routes that helped enslaved individuals escape to free states or Canada. The network operated in the United States before the Civil War.
The Underground Railroad was the name given to the system by which escaped slaves from the South were helped in their flight to the North. It is believed that the system started in 1787. The Underground Railroad was at its height between 1850 and 1860.
D.It was a secret system which helped slaves escape to reedom.