The Junkers Ju 87, known as the “Stuka”, is a German dive bomber and ground attack aircraftThe Ju 87 operated with considerable success in close air support and anti-ship roles at the outbreak of World War II. It led the air assaults during the invasion of Poland in September 1939. The Stuka proved instrumental in the rapid conquest of Norway, the Netherlands, Belgium and France in 1940. Although robust, accurate and very effective against ground targets, the Stuka was, like many other dive bombers of the time, vulnerable to fighters. source wikipedia