Final answer:
Territorial acquisitions in the Treaty of Paris and the Treaty of Ghent are considered most important as they redefined North American borders and facilitated long-term peace following significant conflicts between the United States and Britain.
Step-by-step explanation:
The author likely considers the territorial acquisitions in the Treaty of Paris and the Treaty of Ghent as the two most important aspects due to their significant impact on the geopolitical landscape of North America. These treaties marked crucial junctures in history where Britain acknowledged the sovereignty of the United States and significantly re-arranged territorial ownership on the continent.
The Treaty of Paris of 1763 ended the Seven Years' War and the French and Indian War, effectively granting Britain an expansive territory east of the Mississippi River, altering the balance of power. However, it ignored the interests of the American Indians and did not resolve underlying tensions with American colonists, setting the stage for future conflicts.
The Treaty of Ghent ended the War of 1812 but left many issues unresolved. In its wake, multiple agreements like the Rush-Bagot Agreement and the Convention of 1818 were established, which demilitarized the Great Lakes, set boundaries, and improved foreign trade and economic health. This showed a move towards long-term peace between the United States and Britain and an acknowledgment of U.S. concerns about territory and trade.