To protect positions and cut down on losses both side made trenches.
Even though they may have thought that the trenches would prevent a lot of other problems. It caused many other problems in the trenches.
Problems: Mud Rats, smell, body rot, staying dry, maggots, lice and disease.
Why the US entered WWI Sinking of the Lusitania
There are many reasons why the US entered WWI and one of them was the Sinking of the Lusitania. There were many passengers aboard, although they were secretly carrying explosives. There were 1,198 passengers that died and many of them were Americans.