Nicolae Iorga's involvement in political disputes and the cause of Romanian irredentism became a leading characteristic of his biography during World War I. In 1915, while Romania was still keeping neutral, he sided with the dominant nationalist, Francophile and pro-Entente camp, urging for Romania to wage war on the Central Powers as a means of obtaining Transylvania, Bukovina and other regions held by Austria-Hungary; to this goal, he became an active member of the Cultural League for the Unity of All Romanians, and personally organized the large pro-Entente rallies in Bucharest. A prudent anti-Austrian, Iorga adopted the interventionist agenda with noted delay. His hesitation was ridiculed by hawkish Eugen Lovinescu as pro-Transylvanian but anti-war, costing Iorga his office in the Cultural League. The historian later confessed that, like Premier Ion I. C. Brătianu and the National Liberal cabinet, he had been waiting for a better moment to strike. In the end, his "Ententist" efforts were closely supported by public figures such as Alexandru I. Lapedatu and Ion Petrovici, as well as by Take Ionescu's National Action advocacy group. Iorga was also introduced to the private circle of Romania's young King, Ferdinand I, whom he found well-intentioned but weak-willed. Iorga is sometimes credited as a tutor to Crown Prince Carol (future King Carol II), who reportedly attended the Vălenii school.