The P-70 was a night-fighter version of the Douglas A-20 light bomber.

From Wikipedia:

Although not the fastest or longest-range aircraft in its class, the Douglas DB-7 series distinguished itself as a tough, dependable combat aircraft with an excellent reputation for speed and maneuverability. In a report to the British Aeroplane and Armament Experimental Establishment (AAEE) at RAF Boscombe Down, test pilots summed it up as: “has no vices and is very easy to take off and land … The aeroplane represents a definite advantage in the design of flying controls … extremely pleasant to fly and manoeuvre.”^[4] Ex-pilots often consider it their favorite aircraft of the war due to the ability to toss it around like a fighter.^[5] The Douglas bomber/night fighter was found to be extremely adaptable and found a role in every combat theater of the war, and excelled as a true “pilot’s aeroplane”.^[6]

The P-70 was adapted from the A-20 by adding radar into the nose, and modifying the bomb bay hold an extra gas tank and 20 mm cannon to fire forward.

Although used some in the Pacific theater in its intended role, many others were use to train night fighter aircrews in Florida and California.