| Garland trench mortar | |
|---|---|
 A Garland trench mortar recovered from Gallipoli in 1919 and now in the collection of the Australian War Memorial, Canberra | |
| Type | Trench mortar |
| Place of origin | United Kingdom |
| Service history | |
| Used by | United Kingdom Australia |
| Wars | World War I |
| Production history | |
| Designer | Herbert Garland |
| Manufacturer | Cairo Citadel |
| Specifications | |
| Shell | Jam tin grenade |
| Calibre | 65mm |
| Elevation | Fixed at 45° |
| Traverse | None |
The Garland trench mortar was an improvised mortar used by Australian and British forces at Gallipoli during the Dardanelles Campaign of 1915–16. Developed early in the war by Herbert Garland, a pre-war metallurgist and superintendent of laboratories at the Cairo Citadel, it was the most numerous mortar of the Gallipoli Campaign. A simple, improvised design, the Garland mortar consisted of a smoothbore steel barrel fixed at 45 degrees to a solid wooden base. By means of a powder charge it propelled a variant of the jam tin grenade. Its design meant that the whole weapon had to be turned to change its traverse and raised on a box to increase its range but despite these limitations it was reported to have done "good work" in the front line.