The 1903 resolution of the Alaska boundary dispute (favoring the U.S.) had lasting impacts on Canada:
Britain negotiated on Canada's behalf; Canadians felt their interests were sacrificed for Anglo-American harmony. The tribunal's British member sided with the U.S., deepening resentment.
Unclear boundaries hindered mining, logging, and fishing investments in the Yukon/BC border region until settled.
The dispute galvanized Canadian nationalism. Many realized Canada needed its own foreign policy voice, not reliance on Britain. This accelerated the push for diplomatic independence (achieved gradually, culminating in Statute of Westminster 1931).
Canada lost access to deep-water ports (e.g., Skagway, Dyea) and control over key passes. Seen as a betrayal by Britain.
Prime Minister Wilfrid Laurier's Liberal government was criticized for concessions; contributed to their 1911 election loss.
Canada thereafter insisted on direct participation in international negotiations affecting its interests.