When you come to this trench, swim through it, not over it.
"Trench warfare was used in World War I"
"There was a giant trench around the castle".
The Mariana Trench is the deepest in the world.
As my submarine descended into the ocean trench, we passed by a slab of rock.
The Marianna Trench is great example of subduction.
The artillery subjected the enemy trench-line with cannonade .
In school our class learned about the Marina Trench.
"my trench coat was lost"
In World War 1, trench warfare often resulted in a stalemate between opposing sides, which killed nearly as many men as open warfare would have. In trench warfare, disease and infections killed many of the soldiers on both sides.
"The World war 1 trench was the biggest I have found" or "The trench in the ocean was the biggest in the world"
The ocean trench is almost 7 miles deep.
Soldiers used them to look out of the trench's so they wouldn't have to waste a man who would probably get shot.