How did The gas masks help in ww2?

Everyone in Britain was given a gas mask in a cardboard box, to protect them from gas bombs, which could be dropped during air raids. Why did people fear that chemical weapons might be used in World War Two? Gas had been used a great deal in the First World War and many soldiers had died or been injured in gas attacks.

Explanation:

The US or Germany or other countrys use gas masks to help withstand a gas attacks in ww2 and ww1, Britan gave gas masks to residentss because they thought Germany was gonna release gas from bombs.

Explanation:

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

where is the diagram