During his reign, Carol I personally led Romanian troops during the Russo-Turkish War and assumed command of the Russo/Romanian army during the siege of Plevna. The country achieved full independence from the Ottoman Empire (Treaty of Berlin, 1878) and acquired the Cadrilater from Bulgaria in 1913. Domestic political life, still dominated by the country's wealthy landowning families organized around the rival Liberal and Conservative parties, was punctuated by two widespread peasant uprisings, in Wallachia (the southern half of the country) in April 1888 and in Moldavia (the northern half) in March 1907.