I'll expound on the answer limitations: nothing religious either. The answers are right here on good old Earth. They may be a little old though... hint hint
Good guesses, but the sports answers are out because the referee is not analogous to the general, that would be the coach(es). As for the kid playing with army men, this doesn't do it for me, though it is a terrific guess. It doesn't really fit the 4th line. If you want, you can consider it an answer, but there is a much more appropriate answer.
All of the following riddles have a unique answer and also a common theme. What are the answers to each and what is the theme?
1) Two identical apexes covered in snow
Where mystery shrouds what the townspeople know
2) A surreal adventure into the mind
A timeless existence you will find
In a wealthy Californian suburb
Where the locals are all but kind
3) Though a course providing passage from one place to another
It has long gone missing with the past it has smothered
4) Also in California lies another course
Where Hollywood's bad boys call a home of sorts
A young hopeful actress tries to succeed
And is brought down into muck they have reaped
It's an American thing, but might get taught in other countries. It's the beginning of the Gettysburg Address. If you're American then you definitely know this, if not, then oh well...
Since you didn't mention person A being bound up in any way, he could also try to disarm person B. That would make for a 4th choice. Not that this improves your argument much, but this 4th choice is even more different than the originally posed choices since it involves action on person A's part.