These rights and the analogous privileges granted by Venice were, however, too frequently infringed. Hungarian garrisons were being quartered on unwilling towns, while Venice interfered with trade, the appointment of bishops, or the tenure of communal domains. Consequently, the Dalmatians remained loyal only while it suited their interests, and insurrections frequently occurred. Even in Zara four outbreaks are recorded between 1180 and 1345, although Zadar was treated with special consideration by its Venetian masters, who regarded its possession as essential to their maritime ascendancy.