of Cvijić's scientific career. His efforts and research helped him gather crucial data, which he used during negotiations on the state borders of the Kingdom of Yugoslavia after World War I. Influence on Yugoslav state borders After the conclusion of World War I, Cvijić was invited to the Paris Peace Conference as an expert on border delineation. Using ethnographic charts, Cvijić demonstrated the geographical distribution of the various Balkan peoples which helped determine the borders of a new country: the Kingdom of Serbs, Croats and Slovenes. It was agreed that the new country should incorporate Banat, Bačka, Baranya and Carniola as well as the Bled triangle (Bled, Bohinj and Triglav). Teaching After Cvijić's return from Vienna in March 1893 he became a professor in the Faculty of Philosophy of the Velika Skola in Belgrade where he taught geography. He was tenured and taught there until 1927. Cvijić played an active role in reforming the school, helping found an ethnography department whose first professor was his oldest student and assistant, Jovan Erdeljanović (followed by Tihomir Đorđević); Cvijić remained in the geography department. He was influential in establishing five new faculties: medicine, agriculture and theology in Belgrade, philosophy in Skopje and the Subotica Law School. From 1906 to 1907 he was rector of Belgrade University and again from 1919. In 1915 he lectured about the Balkans at Sorbonne University in Paris. Views Critique of education Cvijić thought that the grammar-school education of that era should last seven years, instead of eight, and felt that young men should be included early in adult life and independent work. He published detailed instructions for conducting field research into populations and habitats to help his colleagues, including the 1907 article "On scientific research and our University". Territorial expansion Cvijić' s scientific impartiality has been criticized for his support of Serbia's political advancement; his geographic work was used to scientifically justify politics of territorial expansion and further territorial claims. According to Cvijić, Bulgarians were "different from the other South Slavs in their ethnic composition". He described as Slav three ethnographic groups previously considered Bulgarians: the Macedonian Slavs, the Shopi and the Torlaks. Cvijić excluded the region around Sofia (Bulgaria's capital) from the Bulgarian group, maintaining that the aforementioned groups were Slavic (and therefore Serbian). He believed that Serbia could govern a much larger area than the territory it held. Legacy With a group of geographers and biologists,