On 15 June 1775, Benjamin White, the chairman of the Massachusetts Committee of Safety, ordered Maj. Gen. Artemas Ward, commander of the Continental Army troops mustered outside of Boston, to occupy the Charleston peninsula just north of the city. Separated from Boston by a narrow channel of water, the peninsula contained the 110-foot high Bunker’s Hill and 62-foot high Breed’s Hill which offered excellent points of observation as well as positions of defense.
"“Wheras, it appears of importance to the safety of this colony that possession of the hill called Bunker’s Hill, in Charleston, be securely kept and defended; and also, some one hill or hills on Dorchester Neck be likewise secured; therefore, resolved, unanimously, that is be recommended to the council of war that the above mentioned Bunker’s Hill be maintained by sufficient forces being posted there; and as the particular situation of Dorchester Neck is unknown to this committee, they advise that the council of war take and pursue such steps, respecting the same, as to them shall appear to be for the security of this colony.”"
Benjamin White, Chairman, The Committee of Safety, to Maj. Gen. Aretmas Ward, 15 June 1775Henry Steele Commager and Richard B. Morris (eds.), “The Spirit of Seventy-Six: The Story of the American Revolution as Told by Participants,” Vol. I (New York: The Bobbs-Merrill Company, 1958), pp. 121-122.