Basically overthrowing a government.
The author's main purpose of writing memoir Night was to describe the terrible conditions of war.
Explanation: The author has described about the inhumanity to nature when the war has took place. The crying night souls of the people are expressed in the poem where they starve for happiness and peace.
Use it describing the way someone rode something. "But Tait had none of Tillotson's gentleness, and he rode roughshod over the obstacles in his way." (That sentence is from yourdictionary.com by the way :) )
