There was an excellent BBC documenatry about this subject which may be of interest: https://www.bbc.co.uk/iplayer/episode/m0006nzt/war-in-the-blood https://www.

There was an excellent BBC documenatry about this subject which may be of interest: https://www.bbc.co.uk/iplayer/episode/m0006nzt/war-in-the-blood https://www.bbc.co.uk/iplayer/episode/m0006nzt/war-in-the-bl...