The Douglas DB-7/A-20 Havoc was the most-produced attack bomber during World War II. A total of 7,477 DB-7/A-20s were built, most at Douglas, although 380 were built at the Boeing plant in Seattle, WA. It entered production when, despite official neutrality in 1938, there was little doubt in the United States that the country should support its allies, Britain and France. It was called the "Boston" when it was built for England's Royal Air Force.