Louis invaded Bosnia from two directions in the spring of 1363. An army under the command of Palatine Nicholas Kont and Nicholas Apáti, Archbishop of Esztergom, laid siege to Srebrenica, but the fortress did not surrender. As the royal seal was stolen during the siege, a new seal was made and all Louis's former charters were to be confirmed with the new seal. The army under Louis's personal command besieged Sokolac in July, but could not capture it. Hungarian troops returned to Hungary in the same month.