http://politicsandwar.com/forums/index.php?/topic/8151-how-this-war-should-play-out/page-4#entry134455
As I keep having to tell people on IRC for some reason: Rose is begging us to let them join the war, but we've forbidden them from doing so.
"alliances" not "allies"
The alliance is the relationship between the two parties. Sun Tzu is saying you should undermine that relationship and make them distrust each other so that they break their alliance.