Release of the animated short <i id="mw1A"><a href="https://en.wikipedia.org/wiki/Steamboat_Willie" id="mw1Q" rel="mw:WikiLink" title="Steamboat Willie">Steamboat Willie</a></i>, the first fully synchronized sound <a href="https://en.wikipedia.org/wiki/Cartoon" id="mw1g" rel="mw:WikiLink" title="Cartoon">cartoon</a>.