"On the nights of June 16-17, 1775, the Americans fortified Breed and Bunker Hills which overlooked Boston Harbor. Although they had not officially declared their independence, a fight for control of the hills became necessary. When the British advanced up the slope the next day, according to legend they saw a red flag, but we have no real knowledge of which American Flag was actually flown in this battle. But John Trumbull, whose paintings of Revolutionary War scenes are quite famous, talked to eye-witnesses and his subsequent painting depicting the battle displayed the Continental flag as shown here. Many historians think the flag more likely to have been at the battle, if any, was the more common First New England Naval Ensign."
"The Massachusetts Navy adopted a White Flag with a Green Pine Tree in the center and the motto "An Appeal To Heaven" below in 1775, probably intentionally the jack form of the New England Flag. This flag, minus the motto, was confirmed in 1971 as the Maritime Flag of the Commonwealth of Massachusetts; a variant with the addition of a blue anchor, the State name and motto was adopted by the State of Maine in 1939 as that State's Maritime Flag. The Third New England Flag was adopted by Lincoln County, Maine as their flag in 1977. The Jack form of the First New England Flag was used by the Town of York, Maine as their flag during the 250th Anniversary of the founding of the Town on August 5, 1902." Source