During the First World War, the Battle of Passchendaele, which was the Third Battle of Ypres and fought between the German empire and the Allies, began on 31 July 1917.
The Battle of the Somme is considered the deadliest battle of the First World War and was fought between the British and French troops and the German army.
The First World War was fought between 32 countries, with two major groups: the Allied Powers and the Central forces.
The alliance of the Soviet Union, along with countries such as France, Italy, Japan, and Britain, during the First World War, was collectively known as the Allied Powers.
The United States of America entered World War 1 on 2 April 1917 when President Wilson announced a declaration of war on Germany.
Periscopes, which are made using mirrors, were used by soldiers to have a look over the trenches in the First World War.
As the name suggests, no man's land was the portion of land between trenches that was not in anyone’s control.
Britain became the first country in the world to have used tanks in World War I. France was the next country to use tanks in the war.
On 11 November 1918, Germany surrendered and along with Allied Nations signed the Treaty of Versailles that led to the end of the First World War.