sentences:  The original plan was to have the first stage of construction finished in 1941–1942, whilst the full system should have been completed by the early 1950s.Construction was very rapid, and by the time of the Munich Agreement in September 1938, there were completed in total 264 heavy blockhouses (small forts or elements of strongholds) and 10,014 light pillboxes, which means about 20 percent of the heavy objects and 70 percent of the light objects.Moreover, many other objects were near completion and would have been functional at least as shelters despite missing certain heavy armaments in some structures.