When the United States declared war on Germany in April 1917, its military had to be expanded and trained before entering combat. In this book, originally published in 1917, an experienced Second Lieutenant in the British Army's Royal Field Artillery gives practical advice on how to be effective soldiers on the Western Front. Lt. MacQuarrie provides suggestions on how officers and NCO can take care of their men and how all combatants can maintain good discipline and even basic comforts while in the trenches. Written in a friendly style, the advice will be familiar to all veterans of all wars.