What food did the world war 1 soldiers eat in the trenches?

Soup or gruel was provided for some of the Allied troops, along with the usual hard bread, salted meat, and whatever potatoes or other vegetables could be secured from undestroyed farms. Occasionally they could find live poultry while moving through the countryside.

Where US troops were on the march, away from any field kitchen, they sometimes brought the squad "Reserve Ration" consisting of about 3 pounds of food: corned beef or bacon, hardtack biscuits, coffee, and some sugar and salt.