 In 1596, the liberation movement spread into Ottoman Montenegro and the neighbouring tribes in Herzegovina, especially those under the influence of Metropolitan Visarion.Of the priests, Patriarch Jovan depended mostly on Visarion, and of the chieftains, mostly on Grdan, the "vojvoda" ("duke") of Nikšić.A Ragusan document from the beginning of 1596 claimed that the metropolitan and many Herzegovinian chieftains gathered in the Trebinje Monastery where they swore oath "to give up and donate 20,000 heroes to the [Austrian] emperors' light."