A) Second Battle of the Marne (July 15-August 5):
- Germany Launched a major offensive on the Western Front, hoping to break through Allied lines and secure victory before American reinforcements could arrive in large numbers.
- French and American troops managed to halt the German offensive.
- This marked the failure of Germany's final bid for a decisive win on the Western Front.
B) Hundred Days Offensive (August 8-November 11):
- Following their success at the Marne, the Allied forces launched a series of coordinated offensives along the Western Front.
- These offensives resulted in significant victories for the Allies, breaking through German defenses and causing heavy casualties.
- The successful offensives pushed German forces back, leading to an improvement in Allied morale and a deterioration in the German defense, eventually leading to defeat and the Armistice of November 11, 1918.