Final answer:
Pontiac's War was grounded in legitimate Native American grievances over British colonial policies and expansion, leading to alliances among tribes and the eventual Proclamation of 1763, aimed at curbing escalating conflicts.
Step-by-step explanation:
The discussion of Pontiac's grievances against the British centers on the validity of his stand during Pontiac's War from 1763-64. Taking historical evidence into account, It can be stated that Pontiac's War was a result of legitimate grievances. These grievances arose from Native Americans' expectations of settlement patterns post-French and Indian War, as well as from the economic and cultural impacts of British colonial expansion. Pontiac utilized the message of a prophet named Neolin, who advocated a return to traditional ways and rejection of British influence, to create a confederacy among various tribes. The conflict ended when it became clear the French would not ally with Native forces, leading to the enactment of the Proclamation of 1763, which restricted colonial expansion and acknowledged Native American land rights to some extent.