Green Mountain Boys Cotton American Flag 3x5 Feet1776 Collection The Green Mountain Boys Flag was the regimental flag of a group of militiamen in the colonial New Hampshire Grants territory, an area between the colonies of New Hampshire and New York that eventually became the State of Vermont. The Green Mountain Boys served under Ethan Allen and captured key forts at Fort Ticonderoga and Fort Crown Point early on in the war with their numerous cannons, howitzers and mortars, which were later