Trench Warfare

Trench Warfare is a type of warfare where troops fight in a trench. There was tons of fighting, with little to no territorial changes.

History
Trench Warfare was first used by the Roman Empire, where Legions would entrench themselves during the night. In early modern Warfare Generals used this method to stop possible attack. In 1840, the trench warfare was again used in the Crimean War.

In the American Civil war, both sides used Trench warfare.

Trench Warfare was widely used during World War 1 on the Western Front. In the Iraq-Iran War, trench warfare was also used widely.

How it works
Troops would either launch shells at each other, or one side would try to rush the other. This system was used for several years in World War 1, between German, French, British, and Belgian troops.

Following that WW1, due to tanks, airplanes, and bombs being used on the battlefield more regularly, using Trench Warfare has reduced significantly.