Trench warfare
Trench warfare occurred when a revolution in firepower was not matched by similar advances in mobility, resulting in a grueling form of warfare in which the defender held the advantage. On the Western Front in 1914–1918, both sides constructed elaborate trench, underground, and dugout systems opposing each other along a front, protected from assault by barbed wire, mines, camouflaged trapping pits, and other obstacles. The area between opposing trench lines (known as "no man's land") was fully exposed to artillery fire from both sides. Attacks, even if successful, often sustained severe casualties.
Battle of the Trough
The Battle of the Trough (March or April 1756) was a skirmish of the early French and Indian War (1754–63) fought between Native Americans and British settlers in the valley of the South Branch Potomac River in what is now northern Hardy County, West Virginia, USA.