Dowding system
... that after almost 75 years, the Dowding system remains the canonical example of force multiplication, having achieved 100% effectiveness on several occasions?
... that after almost 75 years, the <b id="mwBdk"><a href="./Dowding_system" id="mwBdo" rel="mw:WikiLink" title="Dowding system">Dowding system</a></b> remains the canonical example of <a href="./Force_multiplication" id="mwBds" rel="mw:WikiLink" title="Force multiplication">force multiplication</a>, having achieved 100% effectiveness on several occasions?