British tanks on training manoeuvres, in France, during World War I. This photograph of an advancing tank dwarfing British troops, gives an idea of the scale of tanks, and the power they brought to the front line in the last years of the war. The earliest models of tank were slow and excessively heavy, and struggled on wet ground, but later models were much more effective. Credit: National Library of Scotland | Tom Aitken When the first tanks appeared on the battlefields of World War I, journa ...read more