The Alaska Boundary Dispute reference article from the English Wikipedia on 24-Apr-2004
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Alaska Boundary Dispute

Sponsorship the way you would do it
The Alaska Boundary Dispute is a land litigation between the United States of America and Canada (then a British dominion), and more precisely the province of British Columbia that was solved by an arbitration in 1907.

In 1825 Russia and the United Kingdom signed a treaty to define the borders of theirs colonial possessions. After Alaska was bought in 1867 Canada requested a survey but it was refused by the owner as too costly. The maps used by the Russian fishers showed a much larger zone. In 1898 the federal governments agreed on a compromise but the local ones on the west coast refused it.

Then the gold rush on the Klondike made the population most from the USA reached 30.000 people, and considered this land as important.

Finally in 1903 the Hay/Herbert treaty gave the decision to an arbitration at parity.

Canada got a consolation prize, a triangle nammed the panhandler almost enclaved on the north of the coastal zone attributed to Alaska.