During the 13th century, the Mongols launched a series of devastating military raids on eastern Europe, especially in what is present-day Russia. This shaped the self-defense mentality of the region for centuries to come.
assuming the author is Thomas Paine n the passage is from The Crisis, the main points are about the American Revolution. The Britain colonial rules were unfair and people had god-given rights. The colonist should not expect mercy from those who had conquered.