Trench raiding is like playing a game of hide and seek, but instead of looking for people, you are trying to find and take things that belong to the other team.
During a war, each team digs long holes in the ground called trenches. These trenches are like long, narrow tunnels where soldiers can hide and protect themselves. Sometimes soldiers from one team would sneak into the other team's trench and try to take things like food or weapons. This is called trench raiding.
But it's not that easy, because the other team doesn't want their things taken away. They have soldiers guarding their trenches, so the raiding team has to be very sneaky and avoid being seen. They might crawl on their bellies through the mud or wear special camouflage to blend in with their surroundings.
Once they get into the other team's trench, they have to move quickly and quietly to find what they're looking for before the guards catch them. Then they have to sneak back to their own trench without getting caught.
Trench raiding is a very dangerous activity, and soldiers who do it have to be very brave and smart. It's also important to remember that stealing isn't okay, but during a war, both teams are trying to gain an advantage over the other.