The correct answer is 3. They defeated the British and won the fort with all its supplies. In May 1775, Ethan Allen, Benedict Arnold, and the Green Mountain Boys captured Fort Ticonderoga from the British. The fort was lightly guarded, and the Americans were able to surprise the British and take the fort without a fight. The capture of Fort Ticonderoga was an important victory for the Americans, as it gave them control of a strategic location and a large supply of weapons and ammunition.