Simplify the following text for a Grade 10 native English-speaking person.
Original: The Sons of Liberty developed on Manhattan in the days following the Stamp Act protests . The organization participated in a long-term confrontation with British authorities over liberty poles that were alternately raised by the Sons of Liberty and cut down by British authorities .
Simplified: The Sons of Liberty , a Boston based group , were part of a long-term battle with British authorities over liberty poles that were sometimes raised by the Sons of Liberty and cut down by the British .