Field Artillery are weapons used to support ground troops in battle. During the Second World War the major armies used the field gun and the field howitzer. The field gun could fire a light, high-velocity shell up to a range of about 15,000 yards. The short-barrelled howitzer fired a heavier shell shorter distances. Light howitzers (105mm calibre) were more mobile than the heavier medium howitzers (155mm calibre). There were no significant advances in field artillery during the war.