The Battle of Verdun was a major battle during World War I that took place from February 21 to December 18, 1916. It was fought between the French and German armies and is one of the longest battles in history. The Germans aimed to bleed France white by inflicting heavy casualties, while the French were determined to hold their ground, symbolizing national pride. The battle resulted in approximately 700,000 casualties, with neither side achieving a decisive victory. The fortress of Verdun became a symbol of French resilience, and the phrase "They shall not pass" became associated with the French defense.