Poland is a country located in Central Europe. The name Poland derives from its inhabitants, the Polans, who were mentioned by the Roman historian Pliny the Elder in his work Naturalis Historia as living near the Baltic Sea. In 966, the region of Poland was incorporated into the Bolesław I Chrobry State and in 1025 it became a bone of contention between Poland and Kievan Rus', with the latter prevailing in the Battle of Grunwald. The territory of what is now Poland was later divided among several entities: Kingdom of Poland, Duchy of Mazovia, Ruthenian Voivodeship and Galicia. At various times during its history, parts of present-day Poland were controlled by Lithuania, Austria, Prussia and Russia. The establishment of an independent Polish state in 1815 led to wars with Russia and Austria which resulted in territorial losses.