What loyalty does a private or NCO owe to an army in which he knows for a fact that his son will never have any chance to become an officer ?
An interesting fact in the employment of the Indian Army was that they were not used among "white" people (they were used in Italy but to the British "wogs" weren't white). They did not want a situation where a brown man was having sex with a white woman. That is why they were only used on the Western Front in WW1 only at the very beginning when the British manpower situation was dire.
where did you get that info from? part of the process of the destruction of the colonization myth of whites being superior was seeing them kill themselves while serving on the western front. Before that colonists seemed almost invincible to less technologically advanced people.