Imperial measurements have been used in this book as they were in documents and letters from the Great War. Exceptions to this are some gun calibres, which were measured in centimetres.
| 1 inch | 25.4 millimetres |
| 1 foot | 30.5 centimetres |
| 1 yard | 0.914 metres |
| 1 mile | 1.61 kilometres |
| 1 acre | 0.405 hectares |
| 1 centimetre | 0.394 inches |
| 1 metre | 3.28 feet |
| 1 metre | 1.09 yards |
| 1 kilometre | 0.621 miles |
| 1 hectare | 2.47 acres |