What were gasmasks used for in World War I?
To protect the soldiers against gas attacks. Mustard gas was very nasty and burned the lungs, killing soldiers. After World War 1, the use of poison gas was banned by the Geneva Convention.
i dont know when were tanks used in world war 1 The first tanks were used in 1915, and continued to be used off-and-on until the end of the war. It was a new kind of warfare with many technical and tactical problems which were not reolved before the war ended. World War 1 was the first war in which tanks were used, but they did almost nothing to affect the outcome of the war.
The war of 1914-1918 was known as the Great War. In the 1930s, the Great War became known as the First World War, so inevitably the 1939-1945 war became the Second World War. The name "World War" was used some time 1939. Newspapers and governments in the democratic countries discussed how they could avoid a second world war. In Germany, secret conferences were held to plan for and work out how to start what even…