Answer:
It inspired the previously neutral Overmountain men to join the cause.
Explanation:
The overmountain men did not join the cause at first; they mainly kept to themselves in the Appalachian mountains.
After the British won the Battle of Camden in 1780, General Charles Lord Cornwallis wanted to tighten the British grip on the territory, giving the famous quote in the question.
This prompted the Overmountain men to come to action and defend their territory.