Palabras clave Política exterior romana, República romana, Confederación Etolia, Celtiberia, Hispania, Tito Quincio Flaminino Abstract This study deals with the foreign policy patterns deployed by Rome in Hispania and Greece between 200 and 179 BC. Starting from the precedents of the provincialisation of Iberia (197 BC) and the declaration of freedom of the Greeks promoted by Titus Quinctius Flamininus (196 BC), it proposes a comparative analysis focusing on two specific actors: the Aetolian Confederation and the peoples of Celtiberia. The validity of these constants explains the solutions applied on both fronts, including, according to the hypothesis defended, the creation of a Graeco-Celtiberian federation concealed under the veil of a personal agreement, the viability of which lies, among other arguments, in the resumption of hostilities in Celtiberia after the death of Tiberius Sempronius Gracchus. Keywords Roman foreign policy; Roman Republic; Aetolian Confederation; Celtiberia; Hispania; Titus Quinctius Flamininus 1. En ambas localizaciones, Roma hubo de hacer frente a continuos conflictos bélicos que se sucedieron durante el lapso temporal planteado. De hecho, los castra hiberna erigidos entonces no se materializaron en infraestructuras urbanas duraderas para articular las nuevas provinciae6. Si bien este pudo ser un factor relevante, hay que considerar si el beneficio de la extracción compensaría el gasto que suponía el envío anual de tropas.