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#1 poison gas, trench feet
caused stalemates. unless of course you left the trench to get hit by enemy artillery.
Gen. Trenchie of course!
trench
It Became a stalemate. this is where neither of the sides could make a move.
from trench foot or trench fever.
Materazzi Materazzi
World War One.
Because it was the first war where aircraft had a decisive, strategic effect on the course of the war.
No, trench foot was first noted by Napoleon's army in 1812. It was made more well known during the trench warfares of World War I, but it was not new at that time.
The course effect of second world war is that people died almost everywhere and it left people in horror.
The Trench Mortars effected the World War 1 (WW1) by giving an advantage to the users by being able to keep cover and still be able to shoot over and hit or at least hit the ground near the enemy's trenches to force then to move.