Illustrated with a portrait of the author and multiple illustrations of the mortar weapons "The following account of the work of the Light Trench Mortars in France is given in order that the usefulness in the Great War of this wonderful invention of Stokes may be more widely known in New Zealand than at present is the case. The information given in the following pages is all of more or less value because it has been gained from personal experience in the field in France and with the help of official war diaries of different batteries engaged both in trench warfare and in attack, and these batteries are considered to have taken part in more offensive actions than any other batteries in the whole British Army, commencing from Armentières in February, 1916, right up to the end of the War. Very little has been said in any other book written during or since the War, not even in the History of the N.Z.E.F., nor in the history of any of its regiments, of the Trench Mortars or their work, and, therefore, without making this little brochure an effort for people to read by supplying a lot of technical detail, I think it preferable to narrate in simple language some of the principal achievements of the New Zealand Expeditionary Force with this wonderful invention of Sir Wilfred Stokes, after its introduction to the Army."—Introduction