How do you know if a 1918 trench knife is a replica or not?

Take it to a collectors show. They are more than happy to show you if they think you were scammed Answer to start with, look for "LF & C" stamped on the knife. Repros say some other company Replicas worth $25 are marked US 1918 on the brass handle.

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.