Russia has now used a mysterious WW1-style gas on the frontlines to choke Ukrainian soldiers fighting there ... He said: "Here you can see the gas mask that the machine gunner was holding.

A group of Indian soldiers doing gas mask training in World War One Remembrance serves as a way to honour those who gave their lives for Britain in conflict, including during the two World Wars ...

G is for Gas. videoG is for Gas School pupils handle a British gas mask from WW1. Newsreels of the period show soldiers using gas masks in training and at the front.