What is another word for front-line trench?
Pronunciation: [fɹˈʌntlˈa͡ɪn tɹˈɛnt͡ʃ] (IPA) 
There are numerous synonyms for the term "front-line trench," which is a narrow and deep ditch that soldiers use to hide in and fire from during warfare. Some of the most common synonyms include fire trench, combat trench, battle trench, assault trench, and enemy line. Other synonyms include trench line, battle line, forward trench, fighting position, and dugout. Regardless of the name, these trenches served as the first line of defense against enemy attacks and were often the most dangerous places to be on the battlefield. Over time, the design of these trenches evolved, with more sophisticated infrastructure such as bunkers, communication systems, and medical aid stations.
