Oxford commanded the archers and Henry's vanguard using the formation called the Oxford Wedge, which penetrated Richard's army in the shape of an arrow at the Battle of Bosworth, and held Richmond's vanguard in fierce fighting in which John Howard, the Duke of Norfolk and the first cousin of Oxford's mother, who was leading the vanguard of Richard III, was killed. To celebrate the Tudor victory at Bosworth, Oxford commissioned the building of the church of St. Peter and St. Paul, Lavenham.