World War I begins following the assassination of Archduke Franz Ferdinand, leading to a conflict involving many world powers.
One of the largest battles of World War I, known for its heavy casualties and trench warfare.
A protracted and deadly battle between French and German forces, symbolizing the brutal nature of World War I.
The United States declares war on Germany, joining the Allied Powers and changing the course of the conflict.
Armistice signed, ending the fighting on the Western Front and concluding World War I.