What was Thomas Paine purpose in writing The Crisis, No1

The American Crisis is a collection of articles written by Thomas Paine during the American Revolution War. In 1776 Paine wrote Common Sense, an extremely popular and successful pamphlet arguing for Independence from England.

But along with the book, it is completely about English War (American Revolution) and fighting for it's independence and had it's first 13 colonies and on with the current states today.