Definitions for "Trenches"
The point of attack where the linemen butt heads and attempt to gain physical control.
The offensive and defensive line. Games can be won in the trenches which means the team whose linemen perform better on that day come out ahead.
Keywords:  dug, ditches, soldiers, thrown, enemy
Long narrow ditches dug in the earth for soldiers to stand in. The earth dug out was often thrown up in front to protect them from the enemy's fire.