Events explained by Stefan Andreescu in his book, Vlad Tepes (Dracula) between legend and historical facts, 1976:
September 16, 1440: Vlad Dracul (Vlad Tepes’ father) used an extensive title that did not include his father’s name.
September 12, 1445: Lord Walerand de Wavrin was assured at Nicopole that Hungarian forces would arrive within two days.
September 15, 1447 (after): Petru II’s rule ended in Moldova.
September 11, 1448: Pasquale de Sorgo, from Iancu’s camp at Subotiça on the Morava, attested the presence of Moldavian and Wallachian soldiers in the Christian army.
September 1448 (mid-September): Beys of Nicopole, after a victory, installed young Vlad Ţepeş as prince.
September 1448 (September-October): Sultan Murad II’s forces defeated the Christian army at the Battle of Kossovopolje.
September 6, 1450: Bogdan II of Moldavia fought the Poles in the forests of Crasna.
September 24, 1452: Vladislav II complained to the Braşovians that they were sheltering his enemies and their servants despite a recently concluded peace.
September 24, 1453: Iancu of Hunedoara wrote to Sibiu from Lipova, stating that he had made peace with the Wallachian voivode.
September 14, 1455: Iancu of Hunedoara was in Hunedoara, preparing to depart for Braşov, and from there to Moldova or Wallachia.
September 25, 1455: Iancu of Hunedoara was in Roşia, near Sibiu.
September 6, 1456: Vlad Tepes, from Târgovişte, confirmed the renewal of his oath of loyalty to the King of Hungary and assured the Braşovians of freedom of trade in Wallachia.
September 10, 1456: Vlad announced to the Braşovians that a Turkish envoy had arrived, bringing “great burdens”. He stated that when a ruler is strong, he can make peace as he wishes.
September 20, 1459: Vlad Ţepeş titled himself “I, Vlad voivode and lord and son of the great Vlad voivode, ruling and reigning over all of Ungro-Wallachia, Duke of Amlaş and Făgăraş”.
September 1, 1461 (around): Skanderbeg landed in Southern Italy with a small army.
September 8, 1462: The last military success of Vlad Ţepeş, leading to the repulsion of Radu the Handsome.
September 17, 1462: King Matiaş Corvin was in Turda.
September 1462: Vlad Ţepeş was completely abandoned by the boyars, who rallied around Radu the Handsome.
September 26, 1462 (eve or day): Vlad Ţepeş was arrested by Matiaş Corvin, marking the end of his second reign.
September 21, 1475: Matiaş Corvin ordered Thomas Altenberger, mayor of Sibiu, to pay 200 florins to “our faithful Dracula” for his upkeep.
September 6, 1476: King Matiaş Corvin ordered the Saxons of Transylvania to accompany Count Ştefan Báthory to Wallachia.