When Gritti joined Mocenigo in Shkodra and they both ordered to Leonardo Boldu to find Ivan Crnojević and to urge him to mobilize as many of his men as possible to help Venetians during the Siege of Shkodra. Boldu was also ordered to transport Crnojević's cavalry and infantry over the Skadar Lake.[12] Ivan Crnojević had an important role in the defense of the Shkodra because he provided connection with Kotor and supplied the city through Žabljak or Skadar Lake, fighting simultaneously against strong Ottoman forces.[13] He transported men and woods from Kotor over the hills into Žabljak where he built fustas which surprised Ottomans at Skadar Lake.[14] During the whole summer Ivan Crnojević participated in military actions.