Although Operation Overlord was a successful invasion, the leaders did a poor job of planning and casualties were heavier than necessary. In the combination of strong American, British, and Canadian armies, leadership control became an issue on D-Day and influenced major decisions made for battles. One reason for so many American casualties on D-Day was a lack of preparation and planning when using new boats and tanks in the treacherous waters. Another problem arose during the use of aerial bombardments and the effects they had on the rest of the battle. The execution of Operation Overlord demonstrates poor planning due to leadership control struggles, lack of preparedness for tidal seas, and poorly planned air strikes by Allied forces. D-Day was the execution of Operation Overlord, and was structured outside of Montgomery's master plan. This plan by General Montgomery called for the Allied assault along the beaches of Normandy, France, through the division of the five seaside resorts code-named Utah, Omaha, Gold, Juno and Sword. The Americans raided the beaches of Utah and Omaha, while the Gold, Juno and Sword were occupied by the English, Canadians and Free French. These invasions were a mix of Arial bombing and amphibious raids by tanks and soldiers. The battle was considered a success overall due to the completion of the objective; gain a foothold in massive German domination of Europe. A major issue throughout the Second World War was the unity of the Allied Powers. Each of the leaders; Eisenhower, Montgomery, and Bradley had different ideas about the D-Day attack. When they united them, they created a mess of battle... middle of paper... over a period of over two years and although it was necessary to gain a foothold in Germany, the leaders could have taken many more precautions to save many American lives. Operation Overlord illustrates poor planning through leadership control conflicts, lack of preparation for dangerous tides, and failed airstrikes. Works Cited Balkoski, Joseph. Omaha Beach: D-Day, June 6, 1944. Mechanicsburg, PA: Stackpole, 2004. Print.Drez, Ronald J. Voices of D-Day: The Story of the Allied Invasion, Told by Those Who Were There. Baton Rouge: Louisiana State UP, 1996. Print.Marshall, George C. and Forrest C. Pogue. D-day: The invasion of Normandy in retrospect. Tokyo: Shobo &, 1972. Print.McManus, John C. The Americans in Normandy: The Summer of 1944 - The American War from the Beaches of Normandy to Falaise. New York: Forge, 2004. Print.