Why did disease occur and spread in the trenches?

Answer 1

Disease occurred and spread mainly because the conditions of the trenches were so poor that health and hygiene were out of the question. This means that the soldiers were all vulnerable to death, not just from enemy gunfire, but from disease aswell.

Answer 2

Wikipedia has a great article entitled "trench warfare" that can answer your question. here is what is written at the top of that page: Trench warfare is a form of warfare where both combatants have fortified positions and fighting lines are static. Trench warfare arose when a revolution in fire power was not matched by similar advances in mobility, resulting in a slow and grueling form of defense-oriented warfare in which both sides constructed elaborate and heavily armed trench and dugout systems opposing each other along a front, with soldiers in both trench lines largely defiladed from the other's small arms fire and enclosed by barbed wire. The area between opposing trench lines (known as "no man's land") was fully exposed to small-arms and artillery fire from both sides. Attacks, even successful ones, often sustained severe casualties as a matter of course. Periods of trench warfare occurred during the American Civil War and the Russo-Japanese War and reached peak bloodshed on the Western Front of World War I

Answer 3

bacause all the dead bodies

also because of the millions of rats