<a href="https://en.wikipedia.org/wiki/World_War_I" id="mwZw" rel="mw:WikiLink" title="World War I">World War I</a>: <a href="https://en.wikipedia.org/wiki/Radoje_Ljutovac" id="mwaA" rel="mw:WikiLink" title="Radoje Ljutovac">Radoje Ljutovac</a> becomes the first soldier in history to shoot down an enemy aircraft with ground-to-air fire.