-
poison gases
Gases that attact the lungs causing a slow painful death -
machine guns
Guns that could fire 400 to 600 bullets a minute -
tanks
Tanks were not effected by machine gun fire -
air planes
First time they were used in battle -
bombs
Bombs that could be filled with thing like gases -
gas mask
Protected you from poison gases -
u boats
German submarines that sank the lustitania and Sussex