Dornier Do-17Z

The Dornier Do-17Z, known as the "Flying Pencil," was a German light bomber extensively used by the Luftwaffe during early World War II (1939–1941). It saw significant service in the Spanish Civil War, the invasion of Poland, France, the Low Countries, and famously in the Battle of Britain. 
 
Key details regarding its deployment include:
Primary Roles: It operated as a fast bomber (schnellbomber) and, in later variants (Z-7, Z-10), as a night fighter.
Key Campaigns: It was heavily used in the Battle of Britain, targeting airfields, shipping, and cities.
Operational Theater: Used in all major European campaigns, including the Eastern Front (Operation Barbarossa) and by the Finnish Air Force.
End of Service: By 1942, it was largely replaced by the Junkers Ju 88, though some continued to serve in training or utility roles.