You have to get a scoring tool or if you don't have it a utility knife will do. Cut on the wallpaper in sections, then spray it or sponge it with warm water. Water will be absorb and will do the work of softening the wallpaper and glue.
Wait for about 30 minutes then start peeling the wallpaper. If there are some places that is hard to peel off, spray it again then peel or scrape it. Repeat the same process if some sections are hard to come off.
Hopefully, it will come off easily.
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.