The relationship between Wallachia and Hungary soon deteriorated. In a letter written late in 1445 to the townspeople of Brașov, Vlad complained that Wallachian merchants were arrested in Transylvania, although he had left his "little children to be butchered for Christian peace so that and [his country be subjects" of the king of Hungary. His words evidence that he was convinced that his two sons had been murdered in the Ottoman Empire, but the sultan did not harm the boys. In 1446 or 1447, Vlad made peace with the Ottomans, even agreeing to return the Bulgarian refugees to the Ottoman Empire. He intervened in the fight for the Moldavian throne in favor of Roman II of Moldavia in July 1447. The Poles also supported Roman, but Roman's opponent, Peter II, was Hunyadi's protégé.