Rats.
Trench foot and dysentery were the major conditions found in the trenches. Filled with standing stagnant cold water, soldiers on both sides suffered from foot rot and lack of sanitation.
To irrigate the land
The battlefields during World War II were filled with death and destruction. Often, soldiers would fight from holes and trenches in the ground and they didn't have a lot to eat. It was often cold and precipitation fell on the heads of soldiers.
by jusst filing it up
life in the trenches in ww1 sucked. it was cold and wet and muddy and soldiers had to stay there for days if not hours on end. it wasnt a fun happy time in which people were like "yay its cold and wet and muddy lets splash in the puddles" it wasnt like that. soldiers sometimes walked and walked and walked through trenches and their boots were filled with dirty cold water that often had lice and fleas and rats in it. these creatures were everywhere in the trenches. the soldiers could not change their boots that were filled with infected water. their feet went all soggy and diseased. they got trench foot and it was disgusting and painful. they could not cure it sometimes they had to cut off their feet.
this is jargon from the First World War. With constant shelling and poor weather conditions, trenches were in regular need of maintenance. Sides of trenches needed to be strengthened, duck boards maintained, sand bags to be filled and re filled. Any job that had to be done to maintain a secure position
Open the the elements, cold, partially filled with water when it was raining/snowing with rats included to the mix. The soldiers, as best I understand did what they had to do to cope. I have read reports of often waking to find a rat on them or nearby. It was a choice between rats and being wet or being in the open to the gunfire.
The area between the trenches on the Western Front during World War I was commonly referred to as "No Man's Land." It was a devastated strip of land filled with barbed wire, shell craters, and other hazards, making it extremely dangerous for soldiers to cross. It was a deadly territory with little to no control by either side.
by jusst filing it up
water-made canals
Trenches were very helpful for the soldiers in WW1! Trenches were around 7ft deep and built by the soldiers themselves, they could span for hundreds of km's. Some of the main features of the trenches were.....Barbed wire, this was placed around 6 ft away from the top edge of the trenches. This was the 1st line of defence in the trenches to stop enemy soldiers entering the trenches.Fire step, this would help soldiers to get 'Over The Top'(out over the top of the trench) also it would help the soldiers get better aim when shooting out of the trench.Dug out, This was to protect soldiers whilst they were getting their well earned rest.Zig-zag formation, exetremly hard to take over as their could be an ambush around any of the corners, also strong against aerial bombings as the force of the force of the bomb couldn't sweep down a straight line it had to take out all the corners aswell.Machine gun posts, were strategically placed around trenches to gun down any on coming enemy soldiers.
Possibly, when first under fire, in their trousers. I have read the statistic that one in three would, as part of their in-built reaction to extreme fear, lose control of their bowels when first under fire. - Not a romantic or heroic thought! Latrine trenches would be dug, usually in front of the trenches. When the soldiers were relieved, the new unit's soldiers would be responsible for filling in the old latrine trenches and digging new. (They'd do it at night). The latrine trenches weren't inviting. Sit on a plank and let it drop. No toilet paper. Work out what you would do. They were dangerous. if the enemy found them, a trench mortar could make the job quite uncomfortable. Soldiers, if they could get away with it would just go in a corner and cover it up. Or, fill an empty corned beef tin and sling it over the parapet. That worked. Because of all this - and the rotting corpses and body parts, the trenches would stink unbearably.