the definition is a lot more blurry than that ....
for example:
you're on a patrol/harbouring deep behind enemy lines, preparing
for some strike against important target, that could perhaps means
the difference between victory and defeat for Singapore .. e.g.
maybe an airbase strike, or taking out a rocket launching site ....
some of their own soldiers on patrol stumbled onto you .... they
swiftly put their hands up and surrendered ..... so what do you do
now ?
1: kill them, as your critical mission cannot be compromised, but
what about the Geneva convention, what about morality, your
humanity ?
2: take them POW, but this is impossible, as my commander put it
when he posed this question, You are deep behind enemy lines, can't
exactly indent 1 x 5 tonner or chopper to take them back right
?
The mission cannot fail, and the enemy must never catch wind of
what you're preparing to do. What now ? .... what would you do ?
...
to complicate things further .... what if it was some village kids
out picking fruits, instead of enemy soldiers on patrol ?
.....
have fun chewing on this.