failure. Sigismund and Mary were not the only one claiming Dalmatia - or the Hungarian lands in general. Insisting that Dabiša did not support his bid for the Hungarian throne as effectively as his predecessor had, King Ladislaus of Naples started to enforce his own claim to Dalmatia and Croatia. Tvrtko I had professed to support Ladislaus when he expanded his realm to include those lands. Dabiša nevertheless remained at Ladislaus' side in his struggle against Sigismund. From Tvrtko I, Dabiša also inherited the hostility of the Hungarian king, who strived to recover the territories lost to Tvrtko. Sigismund's wish to have his war against Bosnia equated to a crusade obtained Pope Boniface IX's approval. Dabiša was Roman Catholic, but a substantial population of his kingdom consisted of adherents of the Bosnian Church and the Serbian Orthodox Church, branded "heretics and schismatics" respectively in Sigismund's letter to Boniface. It is not known what came about this planned offensive. In the spring of 1392, Dabiša's troops defeated an Ottoman Turkish incursion, reminiscing Tvrtko's victory at the Battle of Bileća. Within a year, Dabiša and Sigismund had agreed to a truce. Signs of decline While the Kingdom of Bosnia retained its standing among neighbouring states in the immediate aftermath of Tvrtko I's death, it was already during Dabiša's reign that conditions within the state started deteriorating. The nobility grew stronger and for the first time acted independently of the king, starting with the Zachlumian Sanković noble family. Dabiša curbed the Sanković power, but the trend was irreversible and eventually led to the weakening of the royal authority. Hrvoje Vukčić Hrvatinić, the kingdom's leading magnate, who governed Croatia on behalf of the Bosnian crown and in defiance of Hungarian claims, came into agreement with Sigismund and Mary but remained loyal to Dabiša. Dabiša and his other vassals were coming closer to an agreement with Sigismund as well, and the two kings were expected to make the Compromise of Đakovo in May 1393. In the end, the meeting did not take place. By June 1394, King Dabiša was in open conflict with John Horvat, a fervent supporter of Ladislaus and enemy of Sigismund. He ordered that men from his islands of Brač, Hvar, and Korčula assist in the siege of Omiš, a city ruled by Horvat. Sigismund, who had been amassing an army since April, took advantage of the discord. The Battle of Dobor