It sounds like a modern military fiction story, but its what actually happened in the 1940s. Here's What You Need To Remember: As military planners today contemplate ways to defend against the threat of today’s far more survivable, longer-range, and precise cruise missiles, the Allied experience in Operation Diver should offer both hope and a sobering warning. London was under siege as it never had been before. Starting June 13, 1944—merely a week after the triumph of the D-Day landings—V-1 cruise missiles launched from Nazi-occupied France began raining down upon the metropolis, their rapid-firing pulset jet motors emitting a horrid buzzing drone.