If trench warfare was an inevitability during the war, it is only because the events leading up to the First Battle of the Marne were quite different. The armies at the beginning of the war moved quickly through the land, but the First Battle of the Marne devolved into a bloody pitched battle that led to the construction of trenches after the Germans retreated, blocked in their pursuit of Paris. When the aftermath disintegrated into a war between trenches, some Germans thought they had the upper hand since they were occupying French territory, but with fewer soldiers than the combined Allied nations and fewer resources and supplies, it was possibly only a matter of time before they were ultimately defeated. The commander of the German armies, General Helmuth von Moltke, allegedly said to Kaiser Wilhelm II immediately after the First Battle of the Marne, "Your Majesty, we have lost the war."

One of the most famous people in the world came to tour the city of Paris for the first time on June 28, 1940. Over the next three hours, he rode through the city’s streets, stopping to tour L’Opéra Paris. He rode down the Champs-Élysées toward the Trocadero and the Eiffel Tower, where he had his picture taken. After passing through the Arc de Triomphe, he toured the Pantheon and old medieval churches, though he did not manage to see the Louvre or the Palace of Justice. Heading back to the airport, he told his staff, “It was the dream of my life to be permitted to see Paris. I cannot say how happy I am to have that dream fulfilled today.” Four years after his tour, Adolf Hitler would order the city’s garrison commander, General Dietrich von Choltitz, to destroy Paris, warning his subordinate that the city "must not fall into the enemy's hand except lying in complete debris."