The two countries were 'neutrals' while their neighbors were at war.
“Why did you do that?” he asked in a 'neutral' tone of voice.
He 'remained/stayed neutral' while his brothers argued.
(..) As you can see, we've had our eye on you for some time, Mr. Anderson. It seems that you've been living two lives. We tried to use a very neutral accent ... ... but a more specific character. And the character kind of evolved. I wanted him to be ... (..)2001 The Matrix Revisited