In May 1775 Ethan Allen and his Green Mountain Boys met in Castleton with Benedict Arnold to plan their next day's attack on Fort Ticonderoga, west, on the New York side of Lake Champlain. Their successful capture of the fort was a holding action that lasted two years until the British launched a powerful sweep southward on Lake Champlain. The battle at nearby Hubbardton, followed by battles at Bennington and Saratoga, marked the turning point of the Revolutionary War in the North. Although German soldiers were stationed in Castleton for a time in 1777, they left as the fortunes of the war changed, and Tory sympathizers were treated with scorn by Castleton settlers. Fort Warren, built in 1777, was also located in Castleton.