Actually, many years ago I was going through my father's things (after his death), and found an old Army manual his unit had published after they finished the battle of Guadalcanal. (His regiment was brigades with a Marine unit to form the Composite Army Marine - CAM - that stayed together through Guadalcanal, Iwo Jima and Okinawa.)

Anyhow, it had tips the unit had learned while moving through the jungle on foot. Among them: take only what you need (but always take three pairs of socks), and you don't need your full mess kit plus canteen and canteen cup: take the cup, spoon, and canteen; the cup can triple as a pot, cup, and bowl. It also talked about stripping down the C-ration kits to just the food, and so forth.