How people went to the toilet in WW1 trenches
2 August 2014 Last updated at 10:16 BST
Soldiers lived in the trenches when fighting during WW1, it was muddy, noisy and pretty basic.
They didn't have toilets so it was probably a bit stinky too.
Ricky's been to a trench in Belgium to find out more, including how they went to the toilet.