Army extension courses. Special text : Signal communication for all arms and services / prep. under the dir. of the Chief Signal Officer for use … Physical training : General : without special equipment / War Department Charty 4. Italy used Gas in Ethiopia Chart 5. Japan used Gas in China Chart 1. The War Department expects the enemy to use gas No international law exists protecting us against use of gas CHart 17. How gas is spread: aircraft praying..[bombing], mortar, artillery Chart 18. Here are four other ways of spreading gas Chart 18. Land mines / Rocket gun / chemical cylinders / grenade Chart 19 The enemy uses gas to put you out of action Chart 21. The enemy uses gas to delay you Chart 22. The enemy uses gas to damage food, water, and equipment