Complex sentence: In response to the Montenegrin assault, the Ottoman vizier, Mustafa Reshid Pasha, seized on it as a convenient provocation and exploited the opportunity to attack Montenegrin towns and villages, where he impaled and hanged many of the Montenegrins that he was able to capture.
Split into simpler sentences: In response to the Montenegrin assault, the Ottoman vizier, Mustafa Reshid Pasha, seized on it as a convenient provocation. He exploited the opportunity to launch attacks against Montenegrin towns and villages, where he impaled and hanged many of the Montenegrins that he was able to capture.