The Schuster Line (Luxembourgish: Schuster-Linn) was a defensive line of barriers and barricades erected by the Luxembourg government along its countries borders with Nazi Germany and France shortly before World War II. It was named after Joseph Schuster who was the engineer responsible for its construction. The line failed to significantly slow the German army's advance during the invasion of Luxembourg on 10 May 1940. The iron gates were simply torn down, and ramps were built over the concrete blockades to drive over them; in other cases, they were blown up.