The author's main purpose in the crisis, no 1 is to make a

Patriotic call to the American people for duty and action.

Explanation:

Thomas Paine's pamphlet "Crisis, No. 1" was to persuade the American people to fight for their country. This pamphlet can also be regarded as a wartime propaganda as it supports the idea of war and the American people's need to join the war.

He also argues that since America had been trying all ways to prevent a war, God will be with them. For God will surely help a nation that had tried all means to avoid wars. He also emphasized on the right choice of going to war. This cause of revolution is right for they are concerned with the rights and freedom of the Americans. So, the people need not have any reservations about fighting but instead be patriotic about it.

where is the section with the question?