Question: On War Against the Turk was a book written during the critical period marked by the first attempt by the Ottoman Empire to capture the city of what?
Sentence (from "On War Against the Turk"): It was one of several pamphlets and sermons by Martin Luther about Islam and resistance to the Ottoman Empire, during the critical period of territorial expansion of the Ottoman Empire in Europe, marked by the capture of Buda in 1526 and the Siege of Vienna in 1529.
Relevant evidence: Yes