The concept of a vehicle to provide troops with both mobile protection and firepower was not a new one. But in the First World War, the increasing availability of the internal combustion engine, armour plate and the continuous track, as well as the problem of trench warfare, combined to facilitate the production of the tank.
Military conflict took place during every year of the 20th Century. There were only short periods of time that the world was free of war. The total number of deaths caused by war during the 20th Century has been estimated at 187 million and is probably higher.
The Dardanelles, a narrow 60-mile-long strip of water that divides Europe from Asia, has been of great strategic significance for centuries. Carefully secured by international treaty, it was the closing of the Dardanelles that eventually brought the Ottoman Empire into the war as a German ally at the end of October 1914.
Clothes were rationed in Britain from 1 June 1941. This limited the amount of new garments people could buy until 1949, four years after the war's end.
Despite the limitations imposed by rationing, clothing retailers sought to retain and even expand their customer base during the Second World War.
On 8 September 1939, the Football Association (FA) declared that all football except that organised by the armed forces was suspended 'until official notice to the contrary'. This was in contrast to 1914, when professional football had continued during the first year of war.