The combination of a field littered with shell hole craters and relentless rain led to a battlefield having the consistency of porridge. The holes in the earth filled with water, debris, and bodies, causing nearly everything to be coated with a slick layer of slime. Despite the rain, contamination of the water supply led to massive dehydration and sickness amongst the troops on both sides during the long months of battle. Guns sank into the earth and troops drowned in the soft mud as they tried to charge the line.