If you meant trench warfare, it was a type of combat used primarily in World War 1 where opposing sides fought in trenches dug in the ground. The area in between the enemies trenches was known as "No Mans Land". By crossing there was an opportunity to get to the other side and weaken the enemy, but very risky as it was filled with land mines and barbed wire. The living conditions were very bad in the trenches. You should look up some pictures to give you a better idea.
Because, tench means danger.
There's no limit; you can create as many as you want: Neighborhood warfare, forest warfare, lake warfare, football warfare, etc. However, generally, when studying history, the traditional ones are: Aerial warfare, naval warfare, guerrilla warfare, conventional and unconventional warfare, urban warfare, jungle warfare, desert warfare, mountain warfare, etc.
Land warfare, naval warfare and amphibious warfare.
General George Washington's aide de camp or personal assistant was Tench Tilghman.
Well, there is no "The" underwater warfare, but there is underwater warfare. Underwater warfare is battle or warfare that takes place under the ocean, like in a submarine.
France, U.S., Russia, Germany, Britain, etc.
Bobby Tench's birth name is Robert Tench.
A Tench is a type of freshwater fish.
Bobby Tench goes by Bobby Gass, and Bob Tench.
A tench is a fish in the carp family.
Tench Coxe was born in 1755.
Tench Coxe died in 1824.
Benmont Tench was born on September 7, 1953.
Benmont Tench was born on September 7, 1953.
Bobby Tench was born on 1944-09-21.
Watkin Tench died on 1833-05-07.
Watkin Tench was born on 1758-10-06.