The battle of the Vuelta de Obligado was a warlike confrontation between the forces of the Argentine Confederation and an Anglo-French squad that tried to navigate the Argentine inland rivers. It took place on November 20, 1845 on the waters of the Paraná River, near the Buenos Aires town of San Pedro and within the framework of the Anglo-French blockade of the Río de la Plata (1845-1850).

The invention of the printing press comprises the creation of a method for reproducing various copies of texts and images on paper or other materials, such as parchment or vellum, using movable type of wood or metal.