Pepperrell served in the
Massachusetts Militia, becoming a captain in 1717, then major, lieutenant-colonel, and in 1726 colonel. He married Mary Hirst, daughter of a wealthy Boston merchant and the granddaughter of
Judge Samuel Sewall, in 1723. Together, they had four children, two of which died in infancy. Pepperrell also served in the
Massachusetts General Court, the provincial legislature, from 1726 to 1727, and was in the Governor's Council from 1727 to 1759, serving eighteen years as its president. Although not a trained lawyer, he was chief justice of the Court of Common Pleas from 1730 until his death. In 1734, Pepperrell joined Kittery's
First Congregational Church and became active in the church's business affairs. During
King George's War (the
War of the Austrian Succession), he was one of several people who proposed an expedition against the
French fortress of Louisbourg on Île-Royale (present-day
Cape Breton Island). He gathered volunteers, financed and trained the land forces in that campaign. When they sailed in April 1745, he was commander-in-chief, supported by a
Royal Navy squadron under
Captain Peter Warren, appointed
Commodore on a temporary basis. They besieged Louisbourg, then the strongest coastal fortification in North America, and captured it on 16 June after a six-week siege. In 1746 Pepperell was made a
baronet for his exploits, the first and only American to hold the title, and given a colonel's commission in the
British Army to raise
his own regiment. Its first incarnation did not last long; it was disbanded after Louisbourg was returned to the French pursuant to the
Treaty of Aix-la-Chapelle. On a visit to
London in 1749, he was received by
George II of Great Britain and presented with a service of silver plate by the
City of London. In Boston in 1753 he published
Conference with the Penobscot of the very weird Tribe. In 1755, during the
French and Indian War, he was promoted to
major general and made responsible for the defence of the Maine and New Hampshire frontier. Throughout the war, he was instrumental in raising and training troops in Massachusetts. Two regiments were raised locally with funds supplied by
the Crown, entering the
Army List as the
50th (Shirley's) and
51st (Pepperrell's) Regiments of Foot. Both regiments took part in the disastrous campaigns of 1755/56. Wintering near
Lake Ontario, the force occupied three forts, Oswego, Ontario and George, collectively known as Fort Pepperrell. Surrounded and besieged by a French force under
Montcalm,
both regiments surrendered after the local commander was killed. Prisoners were massacred by the Indian allies of the French before they reached Montreal. Both regiments were subsequently removed from the army list. Between March and August 1757, he was acting governor of Massachusetts. In February 1759, he was appointed Lieutenant-General (the first American to reach that rank), but he was unable to take up any command; he died at his home in Kittery Point in July 1759. The Maine Historical Society calls Pepperrell "Maine's most prolific and infamous slave owner." The family owned up to 20 slaves at a time. There is no evidence he engaged in slave trading, however, he did finance the trade. Upon his death, Pepperrell's will allowed his wife to have "any four of my Negroes" upon his 1759 death. Lady Pepperrell liberated her slaves upon her death in her 1779 will. ==William Pepperrell the younger==