Give a stream of consciousness and then the final answer. The purpose of the tax was to pay for British military troops stationed in the American colonies after the French and Indian War, which was the North American theater of the Seven Years' War. However, the colonists had never feared a French invasion to begin with, and they contended that they had already paid their share of the war expenses. They suggested that it was actually a matter of British patronage to surplus British officers and career soldiers who should be paid by London.

Answer this question: why did the stamp act of 1765 happen?
The important part for answering this question is: The purpose of the tax was to pay for British military troops stationed in the American colonies after the French and Indian War, which was the North American theater of the Seven Years' War.
So, the final answer is to pay for British military troops stationed in the American colonies after the French and Indian War , which was the North American theater of the Seven Years ' War.