Definitions
There are 2 meanings of the phrase
Trench Warfare.
Trench Warfare - as a noun
A struggle (usually prolonged) between competing entities in which neither side is able to win
Example: "The hope that his superior campaigning skills would make a difference evaporated in the realization that electioneering had become a form of trench warfare"
A type of armed combat in which the opposing troops fight from trenches that face each other
Example: "Instead of the war ending quickly, it became bogged down in trench warfare"
Example Sentences
"Soldiers in trench warfare would often face harsh living conditions."
"The stalemate in trench warfare led to a long and bloody war."
"Many soldiers suffered from trench foot during trench warfare."
"The tactics used in trench warfare were different from traditional warfare."
"Gas attacks were a common threat in trench warfare."