The Underground Railroad was the name of the escape routes used by slaves to escape the South and flee to the North. It was a network of special routes and safe houses that were used by both slaves and abolitionists who were sympathetic to their cause of escaping slavery. It started in the late 1700's and ended after the abolition of slavery. Canada was a popular destination, as slavery was prohibited their and had a longer border for easier access.
<span>The
most important and revolutionary mechanical innovation of the medieval
agricultural revolution was the plough. During the medieval age, the plough
fundamentally improved and was used with multiple oxen teams. This enabled more
land to be ploughed and crops planted.</span>
