Zoners are about as "allied" with Corsairs as Stalin was with the United States in the last weeks of WWII.
It is a forced relationship where each side plays the other (which is also in the bar news). The might of the Zoners is the only thing keeping the Corsairs from moving against them--that's why the Zoners have such a formidable military.
It's extremely edgy cold war detente basically. Each side understands the other is cooperating only so long as there is something in it for them.
Sort of like The US or Europe trying to make "peace" between Israel and the Arabs. Zoners are the resented foreign influence that has enough force to make it influential and makes each side want to have the influence on their side.
The unspoken threat is, "Corsairs, if you won't work with us, the Outcasts might" and vice versa.
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