William Bonville, 1st Baron Bonville, was an English nobleman and an important, powerful landowner in south-west England during the Late Middle Ages. Bonville's father died before Bonville reached adulthood. As a result, he grew up in the household of his grandfather and namesake, who was a prominent member of the Devon gentry. Both Bonville's father and grandfather had been successful in politics and land acquisition, and when Bonville came of age, he gained control of a large estate. He augmented this further by a series of lawsuits against his stepfather, Richard Stucley. Bonville undertook royal service, which then meant fighting in France in the later years of the Hundred Years' War. In 1415, he joined the English invasion of France in the retinue of Thomas, Duke of Clarence, Henry V's brother, and fought in the Agincourt campaign. Throughout his life, Bonville was despatched on further operations in France, but increasingly events in the south-west of England took up more of his time and energy, as he became involved in a feud with his powerful neighbour Thomas Courtenay, Earl of Devon.

Thomas de Courtenay, 5th/13th Earl of Devon was a nobleman from South West England. His seat was at Colcombe Castle near Colyton, and later at the principal historic family seat of Tiverton Castle, after his mother's death. The Courtenay family had historically been an important one in the region, and the dominant force in the counties of Devon and Cornwall. However, the rise in power and influence of several gentry families and other political players, in the years leading up to Thomas' accession to the earldom, threatened the traditional dominance of the earls of Devon in the area. Much of his life was spent in armed territorial struggle against his near-neighbour, Sir William Bonville of Shute, at a time when central control over the provinces was weak. This feud forms part of the breakdown in law and order in England that led to the Wars of the Roses.