Question:  The Siege of Fort Pitt was part of a war named after which leader ?

Context paragraphs:
Fort Pitt Tunnel: The Fort Pitt Tunnel carries Interstate 376 (I-376), U.S. Route 22 (US 22), US 30, and US 19 Truck between Downtown Pittsburgh and the West End neighborhood in the U.S. state of Pennsylvania.  It has two lanes both inbound and outbound.  The tunnel travels beneath Mount Washington.  Its northern ramps lead directly to the double-deck Fort Pitt Bridge.  To mesh with the bridge, the North portal has openings at two levels, with the eastern opening leading to the top deck of the bridge.  At the South portal the openings are at the same level.  "FORT PITT TUNNEL" is mounted in small letters on a grey marblestone frame-like entranceway above the South portal, with large letters used in the North portal frame.

Siege of Fort Pitt: The Siege of Fort Pitt took place during June and July 1763 in what is now the city of Pittsburgh, Pennsylvania, United States.  The siege was a part of Pontiac's War, an effort by Native Americans to remove the British from the Ohio Country and Allegheny Plateau after they refused to honor their promises and treaties to leave voluntarily after the defeat of the French.  The Native American efforts of diplomacy, and by siege, to remove the British from Fort Pitt ultimately failed.  This event is best known as an early instance of biological warfare, where the British gave items from a smallpox infirmary as gifts to Native American emissaries with the hope of spreading the deadly disease to nearby tribes.

Pontiac's War: Pontiac's War (also known as Pontiac's Conspiracy or Pontiac's Rebellion) was launched in 1763 by a loose confederation of elements of Native American tribes, primarily from the Great Lakes region, the Illinois Country, and Ohio Country who were dissatisfied with British postwar policies in the Great Lakes region after the British victory in the French and Indian War (1754–1763).  Warriors from numerous tribes joined the uprising in an effort to drive British soldiers and settlers out of the region.  The war is named after the Odawa leader Pontiac, the most prominent of many native leaders in the conflict.

Fort Pitt Brewing Company: Fort Pitt Brewing Company was a major brewery in Pittsburgh, Pennsylvania, from 1906-1957, which brewed Fort Pitt Beer and other regional brands.  Mark Dudash, a Pittsburgh area attorney and owner of Duquesne Brewing Company, revived Fort Pitt Brewing, and introduced a new Fort Pitt Ale in 2014.  The new Fort Pitt Ale is crafted in the spirit of the brewery established in Fort Pitt in 1765, and is formulated as an ale using two row malt, caramel, and English hops.  The company had manufacturing plants in Sharpsburg, Pennsylvania and Jeannette, Pennsylvania.

Fort Pitt, Kent: Fort Pitt was a fort built between 1805 and 1819 on the high ground of the boundary between Chatham and Rochester, Kent.  It did not last long because it became a hospital for invalid soldiers in 1828, with an asylum added in 1849.  Prompted by Florence Nightingale, the first Army Medical School was founded there in 1860, then to move to Netley in Hampshire in 1863.  By the 1920s the hospital was closed and the site converted into a girls' school, now known as Fort Pitt Grammar School.  The University for the Creative Arts building also occupies part of the site of the original fort and some original brickwork remains visible at the side of the building.

Fort Pitt Museum: Fort Pitt Museum is an indoor/outdoor museum that is administered by the Senator John Heinz History Center in downtown Pittsburgh, Allegheny County, Pennsylvania in the United States.  It is at the confluence of the Monongahela and Allegheny Rivers, where the Ohio River is formed.  Fort Pitt Museum is surrounded by Point State Park, a Pennsylvania state park named for the geographically and historically significant point that is between the rivers.  This piece of land was key to controlling the upper reaches of the Ohio River Valley and western Pennsylvania, before, during and after the French and Indian War as well as the American Revolution.

Fort Pitt Boulevard: Fort Pitt Boulevard is a road in Pittsburgh on the southern area of Downtown, connecting Fort Pitt Bridge and Interstate 376.  Fort Pitt poses a particular challenge to both mapmaker and navigator---along its entire half-mile length, up to six separate roadways making up the Boulevard, the Penn-Lincoln Parkway, and ramps between the latter and various Downtown streets are woven together in a space less than 300 feet wide.

Fort Pitt Hornets: The Pittsburgh Fort Pitt, also simultaneously known as the Fort Pitt Hornets and the Fort Pitt Panthers, was a semi-professional ice hockey team based in Pittsburgh, Pennsylvania.  The team played primarily in the United States Amateur Hockey Association (USAHA), which was technically a semi-pro league by 1924.

Fort Pitt Grammar School: Fort Pitt Grammar School is a selective girls' grammar school with academy status in Chatham, Kent.  Built on Fort Pitt Hill, the site of an old Palmerston Fort, it is situated next to the Rochester campus of the University for the Creative Arts,

Battle of Fort Pitt: The Battle of Fort Pitt (in Saskatchewan) was part of a Cree uprising coinciding with the Métis revolt that started the North-West Rebellion in 1885.  Cree warriors began attacking Canadian settlements on April 2.  On April 15, they captured Fort Pitt from a detachment of North-West Mounted Police.

Supporting paragraphs: Siege of Fort Pitt Pontiac's War
Answer: the Odawa leader Pontiac