Final answer:
D-Day was a crucial event in World War II when US and British forces landed in Normandy to fight against Germany. Similar iconic moments for Britain and the Soviet Union were the Battle of Britain and the Battle of Stalingrad. The US and USSR raced to reach Berlin because it represented the end of the war in Europe.
Step-by-step explanation:
D-Day was an amphibious landing of US and British forces in Normandy, France on June 6, 1944. It was a critical moment in World War II. Similar iconic moments for Britain and the Soviet Union would be the Battle of Britain and the Battle of Stalingrad, respectively. The United States and the Soviet Union raced to reach Berlin because it was seen as a symbol of victory and the end of the war in Europe.