part in Antonescu's life: in 1918, Crown Prince Carol (the future King Carol II) left his army posting to a commoner. This outraged Antonescu, who developed enduring contempt for the future king. Diplomatic assignments and General Staff positions Lieutenant Colonel Ion Antonescu retained his visibility in the public eye during the interwar period. He participated in the political campaign to earn recognition at the Paris Peace Conference of 1919 for Romania's gains in Transylvania. His nationalist argument about a future state was published as the essay Românii. Origina, trecutul, sacrificiile și drepturile lor ("The Romanians. Their Origin, Their Past, Their Sacrifices and Their Rights"). The booklet advocated extension of Romanian rule beyond the confines of Greater Romania, and recommended, at the risk of war with the emerging Kingdom of Yugoslavia, the annexation of all Banat areas and the Timok Valley. Antonescu was known for his frequent and erratic changes of mood, going from being extremely angry to being calm to angry again to being calm again within minutes, behaviour that often disoriented those who had to work with him. The Israeli historian Jean Ancel wrote that Antonescu's frequent changes of mood were due to the syphilis he contracted as a young man, a condition he suffered from for the rest of his life. He became attache in Paris in 1922. He negotiated a credit worth 100 million French francs to purchase French weaponry. He worked together with Romanian diplomat Nicolae Titulescu; the two became personal friends. He was also in contact with the Romanian-born conservative aristocrat and writer Marthe Bibesco, who introduced Antonescu to the ideas of Gustave Le Bon, a researcher of crowd psychology who had an influence on Fascism. Bibesco saw Antonescu as a new version of 19th century nationalist Frenchman Georges Boulanger, introducing him as such to Le Bon. In 1923, he made the acquaintance of lawyer Mihai Antonescu, who was to become his close friend, legal representative and political associate. After returning to Romania in 1926, Antonescu resumed his teaching in Sibiu, and, in the autumn of 1928, became Secretary-General of the Defense Ministry in the Vintilă Brătianu cabinet. He married Maria Niculescu, for long a resident of France, who had been married twice before: first to a Romanian Police officer, with whom she had a son, Gheorghe (died 1944), and then to a Frenchman of Jewish origin. After a period as Deputy Chief of the