The Douglas A-26 Invader was an American twin-engine attack aircraft used extensively by the United States Army Air Forces (USAAF) and the United States Navy during World War II. It was known for its speed and its firepower, being used for a variety of missions including ground attack, night bombing, and reconnaissance. It was powered by two Pratt & Whitney R-2800 Double Wasp engines and was armed with machine guns and a bomb load. The Invader was a formidable aircraft for its intended roles, and it served in various theaters of war, notably in the European theater.