The Battle of Somme was fought by the British and the French against the Germans. More than one million soldiers were either wounded or killed in this battle.
France and British forces confronted Germany on two fronts in the first battle of the Marne after Germany had invaded Belgium and moved towards Paris.
On this day, the German and British armies came together on the Western front and observed a temporary ceasefire. However, in other areas of the Western Front, the war continued.
The Germans attacked the British submarine on May 7, 1915, believing that the ship was carrying ammunition for Britain.
The three nations, Russia, Great Britain, and France, came together to stop the invasions of Germany and formed the Triple Entente.
The US got involved in World War 1 after Germany's repeated attacks on its submarines.
The Battle of Verdun was fought between the Germans and the French, and it lasted for 9 months, 3 weeks, and 6 days.
Gavrilo Princip, a German national, shot Archduke Franz Ferdinand, his wife, and their son. Archduke Franz Ferdinand was heir to the Austro-Hungarian Empire
Woodrow Wilson declared war against Germany as Germany had sunk 4 US ships and sank the British submarine Lusitania.
The Norwegian government did not allow its people to volunteer and participate for or against any country.