The 'Valkyrie' is based on the true story of the July 20, 1944 plot to assassinate Adolf Hitler. A group of German officers, led by Claus von Stauffenberg, planned to overthrow the Nazi regime. They named the operation 'Valkyrie' which was originally a military contingency plan. Stauffenberg planted a bomb near Hitler during a meeting, but unfortunately Hitler survived the attempt. This event is a significant part of World War II history, showing the resistance within Germany against the Nazi dictatorship.
Well, 'valkyrie based on true story' refers to the events surrounding the Valkyrie plot. It was a brave but ultimately unsuccessful attempt by some German military officers to stop Hitler. Valkyrie was an existing plan in the military that they tried to use as a cover for their actions. They were horrified by Hitler's actions and the way the war was going, so they took this extreme step. It's a story of courage and moral struggle within the German military during a very dark time in history.