Most soldiers during WWI ate MRE's which are Meals Ready-to-Eat. They were also supplied with bars of chocolate; since they were required to fight for long periods of time they could get a slight energy boost from thecaffeine and sugar enriched bars.
See the question: What did the soldiers in World War 2 eat?
dogs/cats
eat pie
THey probably ate bread..................................
popcorn
food.
foeses
food.
Chocolates
fish
cofee
No, But they still were starving!