The Fort Miles Historical Association will resume its historical lecture series at 10:30 a.m., Saturday, Oct. 5, at the Fort Miles Museum in Cape Henlopen State Park. In a presentation titled “A Not Too Distant Mirror,” military historian Bill Grayson will review the troubled years leading up to World War II, and America’s awareness and concerns about developments in Europe and the Far East. With a wary eye on growing German sea power, the United States began an ambitious coastal defense program that was underway when Japan attacked Pearl Harbor. The presentation also surveys America’s concerns about invasion threats to its mainland and the development of strong defenses on all three coasts, using Fort Miles as an example.