Books about Intrenchments

The Attack in Trench Warfare: Impressions and Reflections of a Company Commander

Elements of Trench Warfare

Training for the Trenches

Trench Warfare: A Manual for Officers and Men

Handy War Guide for My Company: Handy Company Commander's Guide

Tactics and duties for trench fighting

Notes on Training for Rifle Fire in Trench Warfare

Specimens of British Trench Orders

Bombers' Training, and Application of Same in Trench Warfare

Use of Mines in Trench Warfare (From the French School of St. Cyr)