Final answer:
Fighting continued after the Treaty of Paris of 1763 due to the dissatisfaction of Native American tribes who were not considered in the treaty, and after the Treaty of Paris of 1783 because of slow British evacuation and unresolved tensions leading to the War of 1812.
Step-by-step explanation:
After the Treaty of Paris was signed in 1763, ending the Seven Years' War and the French and Indian War in America, fighting continued in various forms across North America. One reason for the continued conflict was that the treaty did not take into account the interests and territorial claims of the Native American tribes. These tribes had previously been able to play European powers against one another, but with the British now the major power in North America, this dynamic changed. As a result, violence continued as many tribes remained hostile to the British.
Moreover, the Treaty of Paris in 1783, which ended the American Revolutionary War, also failed to ensure peace on all fronts. Despite the treaty, British troops were slow to evacuate from American territories, and tensions remained high due to the persecution of Loyalists and the unsatisfactory enforcement of treaty stipulations regarding American shipping. A legacy of these unresolved issues ultimately manifested in the War of 1812, less than thirty years later.