Trench warfare was introduced in a large role in the American Civil War. In the beginning of the Civil War the soldiers would not be in protective barriers, but rather they would line up shoulder-to-shoulder and fire muskets and bayonets at the opposing armies. The muskets and bayonets were not very accurate and did not cause as many casualties that a weapon in World War One would have caused, so both sides were able to fight in lines, with no problem. Eventually during the Civil War, muskets and bayonets became ineffective for the armies and “Minnie Rifles” were introduced. These were designed for more rapid fire and allowed a much faster reload. These were much more effective than the previous weapons and the amount of casualties sky-rocketed when soldiers began to use them. The amount of casualties became too high and the two sides needed to change their strategy, so they turned to trench warfare.
Trench warfare was what they needed to help both sides get through the war, and not lose everyone. Instead of being out in the open fire, soldiers were able to stay in bunkers and protect themselves from the open fire of the Minnie Rifles. Moving to the trenches saved the lives of many, and also prolonged the civil war. The trenches gave both sides a good source of protection and stability.