american revolutionary war battle of forts clinton and montgomery battle of hubbardton battle of oriskany bennington battle day bennington battle monument bennington flag british army canada colonel dragoon duchy of brunswick fort ticonderoga france friedrich baum green mountain boys heinrich von breymann john burgoyne john stark kingdom of great britain lieutenant colonel massachusetts militia molly stark national historic landmark native americans in the united states new hampshire new hampshire militia new york city pincer movement redoubt sabre saratoga campaign seth warner siege of fort stanwix thirteen colonies vermont walloomsac river