2. What were the trenches and why were they there? The trenches in WW1 were the front line, the most dangerous position in the war. They were subject to constant enemy fire and bombardment. The trenches were a complex system of narrow ditches designed to protect soldiers from the enemy. They were zig-zagged to prevent the opposition from firing straight down the line and gas attacks spreading too far. The trenches were generally dug in such a rush that the soldiers usually had no time to reinforce