What different types of weapons were used in the lost battlion?

During WWI, there was a wide range of new and old weapons, including:

Rifles. All nations used more than one type of firearm during the WWI

They had used machine guns.

They had recently developed flamethrowers.

Mortar shells.

Airstrike/artillery.

Poisonous gasses.

Large, steel tanks.

And further developed aircraft.

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-Pepetreefrogthe2nd