Given the following reasoning and answer, what was the question? This is the relevant information: The Western Allies of World War II launched the largest amphibious invasion in history when they assaulted Normandy, located on the northern coast of France, on 6 June 1944.
 The answer: the northern coast of France
The question Passage: The Western Allies of World War II launched the largest amphibious invasion in history when they assaulted Normandy, located on the northern coast of France, on 6 June 1944. The invaders were able to establish a beachhead as part of Operation Overlord after a successful "D-Day," the first day of the invasion.

Question: Based on this passage, where did the invasion of normandy take place?