the allies soon realized that they could not not break through this line, they also began to dig trenches.
The Germans.
The Panama Canal was built by digging out a large trench in Panama for boats to travel through. This ditch-like trench would be supported by many locks.
they built trenches for procetion and they used it as a base.
The Germans dummy
most combatants at that time NEVER built straight trench's. 1. If a shell struck in to the trench, the shrapnel would go flying everywhere in the trench if it was in a straight line, the "curve" in the trench would deflect the shrapnel. 2. if part of the trench was overrun, resistance could still continue with a zigzag trench. If it was in a straight line, enemy soldiers could just fire there guns in a straight line and kill everyone easily.
The Germans built the U-Boat to stop blockades against them and create their own.
The Berlin Wall was built to stop east Germans from travelling to West Germany.
A dugout was a trench that was dug and roofed over as a shelter for troops.
Fire steps were built on the parapet (side of the trench facing the enemy) which allowed soldiers to step up and fire over the tops of the trench.
Germans built the first Autobahns, starting in the 1930s.
it was pretty well poo
there weren't any, the Germans built them in Poland.