I don't know about sizable wars. What did you have in mind?
http://www.lookandlearn.com/blog/19120/suleiman-the-magnificent-might-have-conquered-europe-but-for-the-austrians/Look at the opening story (it's not the best telling, but I'm having difficulty finding a better one, oddly enough, and I don't remember the name of the history book I originally saw it in). The ostensible reason for the Ottomans invading Hungary was this insult by the Hungarian King and the execution of the ambassador. Of course, no one thinks that was actually the
real reason, but it was a convenient pretext, which is what we were discussing.
