First Arab Siege
... that the invention of Greek fire was crucial in breaking the First Arab Siege of Constantinople?
... that the invention of <a href="./Greek_fire" id="mwCEc" rel="mw:WikiLink" title="Greek fire">Greek fire</a> <i id="mwCEg">(pictured)</i> was crucial in breaking the <b id="mwCEk"><a href="./Siege_of_Constantinople_(674–678)" id="mwCEo" rel="mw:WikiLink" title="Siege of Constantinople (674–678)">First Arab Siege</a></b> of <a href="./Constantinople" id="mwCEs" rel="mw:WikiLink" title="Constantinople">Constantinople</a>?