Portugal–Spain relations of Enlightenment. Until then the word Spain (Hispânia) was only a geographic location referring exclusively to the Iberian peninsula. It was only in the constitution of 1812 that the name "Españas" (Spains) was adopted for the country along with the use of the title of "king of the Spains". The constitution of 1876 adopts for the first time the name "Spain" for the Spanish state and from then on the kings would use the title of "king of Spain". Portugal, Castille and Aragon were allies in the "Reconquista" in which they reconquered land from the Muslim Moors in the south
Mongolia–Russia border Mongolia–Russia border The Mongolia–Russia border (, "Mongol-Orosın xil"; , "Rossijsko-mongoljskaja granica") is the international border between the Russian Federation (CIS member) and Mongolia. It is virtually all land. The total length of the border is 3485 km. The boundary is the third longest border between Russia and another country, behind the Kazakhstan-Russia border and the China-Russia border. The Russian state expanded into the regions north of today's Mongolia in the 17th century. Much of the line of the today's Mongolia–Russia border line was set by the Treaty of Kyakhta (1727) between the Russian and Qing Empires (the Mongolia at the