Looking into Typefaces

As the theme is WW1, I have looked into various different typeface ideas for my design ideas. For the main body of text I will need to use a fairly easy to read serif or san serif typeface. However for the title of the book and other headings I want to use a typeface that is suited to the theme of the book.

Army/stencil style fonts. 

Typewriter style

I feel that both the army and typewriter style fonts are suitable however I need to consider what will be suitable for the age range. Due to legibility. I will test the various fonts on my initial design ideas,in order to see what is the most appropriate and effective.