Air warfare during World War Two progressed at an astonishing rate. At the beginning of the war there weren't any night fighters as such. By the end of it there were aircraft designed specifically for hunting other aircraft at night: guided by ground stations and equipped with state of the art radar equipment that could identify a target at short range.
One of the most successful German Night Fighters was the Junkers Ju88-G6. It was armed with two 20mm canon mounted above the fuselage just behind the cockpit, the so called 'Schräge Musik' (Jazz Music), angled to fire upwards into the belly of a bomber to explode its payload of bombs.