As a Member of a Army group, You train to fight against other members like you, because at the end, at war you will fight other members or other groups that were trained like you, to fight someone like you.
Since there is a Big Free Space on Planet Earth, Goverments could be Proud to send their Military Forces to some Free Space Zone, to fight other countries Military groups, Far away from the Civilians.
Only Real Man and High Quality Goverments can accept this challenge.
All others are the Week,
Equal to many others that don't accept to fight in a dedicated Zone to Fight.
Ethics ... The Blessings of God was to give you Freedom of Choice.
then, You just need to make the Best one.