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The relationship between Canada and the United States is one of the most unique and long-lasting partnerships in the world. These two neighbors share more than a border — they share centuries of history shaped by conflict, cooperation, and constant change. From early Indigenous networks to modern diplomacy, trade, and defense agreements, their story is one of evolution, trust, and occasional tension. This article takes a closer look at how the Canada–US relationship developed and why it remains so important today. Before Borders: Early Contact and Indigenous Nations Long before Europeans arrived, the regions that would become Canada and the United States were home to rich and interconnected Indigenous nations. These communities maintained trade networks, political alliances, and cultural relationships that stretched across large areas of North America. Groups such as the Haudenosaunee (Iroquois Confederacy) played major diplomatic roles, creating systems of cooperation that predate...