 Complete the following phrase:  Aside from periods of open warfare 154168, 15931606, 16604, 168399, the Ottoman-Habsburg frontier in Hungary was characterized by local skirmishes and small-scale conflict known as the little war . In the absence of the imperial army, command was entrusted to the governor of Buda, who could wield significant provincial forces in the defense of the frontier. Local military ventures could occasionally lead to escalation, as in 1592-3 when the 