terrain vs streatcher bearer

• The constant bombing and shelling often left the Western Front a landscape of craters, mud and water. Roads might also been destroyed. This caused issues in both transporting wounded men away from the front line and with any regular communication.
• No Mans Land  The land was dangerous wounded could only be collected at night. The destroyed terrain was muddy, contained stagnant water filled craters with rotting corpses and unexploded munitions and chemicals waste.  
• Trench System The trenches could often get clogged up with men and equipment, this made it hard for stretchers to oto manoeuvre whilst under fire. The numbers of wounded also became too r overwhelming for the medical system.