<a href="https://en.wikipedia.org/wiki/British_Aerospace" id="mw-g" rel="mw:WikiLink" title="British Aerospace">British Aerospace</a> and <a href="https://en.wikipedia.org/wiki/Marconi_Electronic_Systems" id="mw-w" rel="mw:WikiLink" title="Marconi Electronic Systems">Marconi Electronic Systems</a> merge to form <a href="https://en.wikipedia.org/wiki/BAE_Systems" id="mw_A" rel="mw:WikiLink" title="BAE Systems">BAE Systems</a>, Europe's largest defense contractor and the fourth largest aerospace firm in the world.