Beagle Channel arbitration

On 22 July 1971 Salvador Allende and Alejandro Lanusse, the Presidents of Chile and Argentina, signed an arbitration agreement (the Arbitration Agreement of 1971). This agreement related to their dispute over the territorial and maritime boundaries between them, and in particular the title to the Picton, Nueva and Lennox islands near the extreme end of the American continent, which was submitted to binding arbitration under the auspices of the United Kingdom government.

On 2 May 1977 the court ruled that the islands belonged to Chile (see the Report and decision of the Court of Arbitration). On 25 January 1978 Argentina repudiated the arbitration decision and on 22 December 1978 started (and a few hours later aborted) military action to invade both those islands and continental Chile.^[1]