Adopted in 1923. The flag borne by regiments of the State of Vermont in the Civil War, the Spanish- American War, the Mexican Border service and at the outbreak of World War I, was a flag having the state coat-of-arms on a blue field. A flag of the same design had by custom also been carried as the Governor's flag. Accordingly, No. 3 of the Acts of 1923 approved this design as the official state flag as it is today. (ref; libraries.vermont.gov, sec.state.vt.us). Both New York and New Hampshire claimed Vermont in the late 1700's. In 1775, the Green Mountain Boys formed to defend the New Hampshire land grants against the New Yorkers.