Operation Soberanía was a military invasion that began due to a border dispute between what two countries?
Operation Soberanía Operación Soberanía (Operation Sovereignty) was a planned Argentine military invasion of Chile started on 22 December 1978 due to the Beagle conflict dispute. The invasion was halted after a few hours and Argentine forces retreated from the conflict zone without a fight. Whether the Argentine infantry actually crossed the border into Chile has not been established. Argentine sources insist that they crossed the border.
1991 Sino-Soviet Border Agreement The 1991 Sino-Soviet Border Agreement was a treaty between the People's Republic of China and the Soviet Union that set up demarcation work to resolve most of the border disputes between the two states. Initially signed by China and the Soviet Union, the terms of the agreement were resumed by Russia after the breakup of the Soviet Union. The treaty resulted in some minor territorial changes along the border.