Glossary of terms
| Great War | the term used to describe World War I by the generation that lived through it - also 'First World War' | 
| green line | a line of demarcation between two enemies in a conflict | 
| grenade | a small bomb that can be thrown by hand | 
| gross domestic product (GDP) | the total value of goods and services produced by a nation in a year | 
| guerrilla | person who fights as part of an unofficial army, usually against an official army or police force | 
| hardtack | a hard, flat, saltless biscuit that formed part of navy or army rations | 
| heave to | to stop moving forward, especially a ship or vessel | 
| heliograph | an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays | 
| home front | the country where civilians live | 
| homemaker | a person in a household who spends time caring for their home and family, usually without paid employment | 
| howitzer | a large gun with a short barrel that fires shells high up into the air so that they drop down onto a target | 
| human rights | basic rights that many societies believe all people should have, such as the right to life and liberty, freedom of opinion and the right to education and work. | 
| humanitarian | relates to the promotion of human welfare, dignity and respect | 
| illiterate | unable to read or write | 
| in perpetuity | describes as action or activity that's intended to last forever | 
| incendiary | describes a weapon designed to cause a small fire; dropped together from aircraft to cause widespread damage | 
| indemnity | an amount of money paid to someone because of some damage or loss they have suffered | 
| infantry | soldiers who fight on foot | 
| insurgent | person who fights against the army or government of their own country | 
| internee | a person put in prison for political reasons, especially an enemy citizen during wartime or a terrorism suspect | 
| internment | the practice of putting people, usually civilians, in prison for political reasons, especially enemy foreign nationals during wartime or terrorism suspects | 
| invalided | remove someone from active service in the armed forces because of injury or illness | 
| investiture | a ceremony in which someone is given an official title | 
| jaunty | naval slang for the master-at-arms, a senior sailor responsible for good order and discipline | 
| kamikaze | An attack on an enemy where the actor knows that they will be killed doing it | 
| kriegies | military slang term for an Allied prisoner of war in a German camp during World War II | 
| landmine | an explosive placed on the ground or just beneath the surface | 
| light case | patient with lower-grade wounds or illness | 
| lighter | a flat-bottomed barge used for transporting cargo, especially to load or unload a ship | 
| mackintosh | a waterproof material made by cementing layers of cloth with rubber | 
| mandate | the authority to carry out a particular policy or task as a result of winning an election or vote | 
| manoeuvre | a military training exercise that involves the movement of soldiers and equipment over a large area | 
| mateship | comradeship of friends, usually male, viewed as an institution | 
| mediate | trying to settle an argument between 2 groups by talking to them both and finding things that they can both agree to | 
| medic | a doctor who works with the armed forces, as part of a medical corps | 
| Mentioned in Dispatches (MID) | an official report by a superior officer naming a person in recognition of their bravery or distinguished service | 
| merchant navy | the ships or crew engaged in a nation's commercial shipping | 
| merchant ship | a ship that is part of a country's commercial shipping fleet, involved in transporting goods or carrying passengers; also known as a 'merchantman' | 
| militant | describes a person with a very strong belief who tries to bring about political or social change, often in extreme ways that others find unacceptable | 
| military junta | a government led by a committee of military leaders | 
| military observer | a military official deployed as part of a peacekeeping force to provide support to a coordinated mission or peace operation | 
| militia | a group that operates like an army but whose members are not professional soldiers | 
| Militia | an armed force of part-time members trained for Australia's home defence that operated from 1930 to 1942. Its members were all volunteers until conscription was introduced on 1 January 1940. Militiamen could not serve outside Australia and its territories. | 
| mine | a bomb hidden in the ground or in water that explodes when something touches it | 
| minelayer | a warship or aircraft designed for the carrying and laying of mines | 
| mobilise | to prepare a military forces for a conflict; mobilisation (noun) | 
| Morse code | a telegraph code used for sending messages | 
| musketry | the technique of using small arms | 
| mustard gas | a chemical weapon used during World War I that caused blistering, sore eyes and internal injuries | 
| muzzle velocity | the speed of a projectile as it leaves a gun's muzzle |