Weren't gas chambers for killing people found at some of the Nazi concentration camps when they were captured by the Allied armies?

No. The 'gas chambers' on display at Dachau and Auschwitz were originally crematory morgues. The Dachau crematory morgue was altered by the U.S. Army and Soviet Army into mock-up 'gas chambers disguised as a shower' for 'educational' purposes.

The one at Majdanek was actually a delousing chamber for the fumigation of mattresses and other material. Several forensic examinations of these rooms and others which are now in ruins conclude none of these facilities could have been used as execution chambers for the killing of large numbers of people. Their designs are all wrong.

Despite the fact that these 'reconstructions' are displayed to hundreds of thousands of tourists every year, Holocaust historians such as Arno Mayer and Hugh Trevor-Roper admit nobody knows what the gas chambers looked like or how they operated. This is no reason not to believe the gas chambers are a myth according to these two authors, but others take a more skeptical view. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.