Argentina–Spain relations were made declassified and stated that Prime Minister Margaret Thatcher feared that during the Falkland war, Spain would join Argentina by invading Gibraltar. A dispute arose in 2012, when Argentina sought to nationalize the energy company YPF, owned by the Spanish multinational company Repsol. Spain warned against such a move stating that it would harm bilateral relations if such a move were to happen. On 16 April, Argentina's President Cristina Fernández de Kirchner announced the nationalization of YPF, to which Spain warned of a "clear and decisive" response. Since then, Argentina has recompensed the Spanish government and Repsol over the
Repsol and commercialization, which remained exclusive to CAMPSA. In 1948, REPESA (Refinería de Petróleos de Escombreras S.A.) was incorporated for the installation of a refinery in the Valley of Escombreras (Cartagena). 'REPESA became the symbol of the increasing industrial consolidation in the refining sector, as it took on the production and marketing of petrol, oils and lubricants under its own brand name.' From the beginning, REPSOL was REPESA’s "star brand" of petroleum as a REPESA product brand. In 1999 Repsol bought 97.81% of the Argentine oil and gas company YPF S.A., which at the time was the largest oil-and-gas company in