An economy measure used during World War One was the mixing of coal-slack with clay to make an efficient substitute for coal. From The Pageant of the Century, published 1934

The railway carriage in which the Armistice to end World War One was signed, November 11, 1918, From The Pageant of the Century, published 1934

Women took over many men's jobs during World War One, thereby leaving the men free to fight. Seen here the women are packing and loading shell castings. From The Pageant of the Century, published 1934

German troops marching easy through Belgium during WWI. From The Pageant of the Century, published 1934

Luigi Cadorna, 1850 - 1928. Italian Field Marshal, chief of staff of the Italian army during the first part of World War I. From The Pageant of the Century, published 1934

Women took over many men's jobs during World War One, thereby leaving the men free to fight. Seen here the women are putting a coat of paint on aerial bombs. From The Pageant of the Century, published 1934

Bulgarian officers of the newly formed army of Tsar Ferdinand of Bulgaria, who had signed a treaty with Austria-Hungary and Germany, seen here studying maps during World War One. From The Pageant of the Century, published 1934

Soldiers during World War One sychronizing their watches with a clock mounted on a post in the camp. This was vital to obtain unanimity of movement and perfect co-operation before an attack. From The Pageant of the Century, published 1934

A lonely sentinel guards the East coast shores during WWI. From The Pageant of the Century, published 1934

Lieutenant General Sir Frederick Stanley Maude, 1864 –1917. British commander, most famous for his efforts in Mesopotamia during World War I. From The Pageant of the Century, published 1934

A German officer in a heavily sandbagged observation point during WWI. From The Pageant of the Century, published 1934

Civilians using their daily trades, in this case bridge building, during WWI. From The Pageant of the Century, published 1934

Big Bertha in action during World War One. From The Pageant of the Century, published 1934