Where and when did the allies open a second front in Europe? What was the result?

Allies opened a second front in Europe, but it was a long process that took years. Taking years to plan and come up with ideas on how they would do this, this got a code name called Operation Overload. By June 1944, almost 3 million troops were ready for the invasion. On June 6, 1944 the day know as D-Day had started. 4,000 ships filled with Allies invaded France. Although going under heavy gun fire, the Allies pushed on. They would not retreat. More and more Allies continued coming onto France, eventually reaching Paris. After four years of being ruled by the Nazis, France was finally free.