The Germans used a AT-4
Ships
Tear Gas and Mustard Gas
The zeppelin and the blitzkrieg.
Chemical weapons; poison gas usually delivered by artillery.
In World War I the Germans used phosgene and chlorine gases on their enemies. During the Iran-Iraq War, Iraq used chemical weapons on the Kurds in Halabja.
Phosgene is a chemical warfare agent used by Hitler in WWI.
The tank and the automatic rifle and grenades and larger mortar fire are the most dangerous weapons. The most dangerous chemical weapon was the mustard gas the Germans used.
The Potato Gun
The most common method was with artillery.It is NOT a biological weapon, it is a chemical weapon.
The 'thick green light' mentioned in this poem is the Chlorine gas used by the Germans as a chemical weapon during WW1, illuminated by the flashes of shellfire and tracer bullets.
Poison Gas
The Germans used a AT-4
In World War 2 the Germans introduced the V2 rocket, a terrifying new offensive weapon. In WW1 poison gas was considered the most terrifying weapon.
The Germans used the PanzerFaust (tank fist). It was a disposable anti tank weapon.
Zepplins and U-boats.
V2 rocket