Forest Combat is a Codex Entry featured in Battlefield 1 It is unlocked upon making it through the forest without any melee kills in the chapter Fog of War in the mission Through Mud and Blood.
Transcript[]
FOREST COMBAT IN WORLD WAR 1[]
The French-American attempt to push the German Army out of the Argonne Woods in 1918 soon proved to be a nightmare for the attackers. Machine guns hidden in bushes and earthworks fired on advancing troops, while concealed marksmen waited silently for unsuspecting attackers.
Camouflaged field guns fired at point blank range at struggling tanks while infantry engaged in brutal close fighting. Forest combat was close quarters combat.