offer a reward to a new administration in North Korea, that will peacefully unite with South Korea Also to Iran & Syria

Offer a bounty to a new government in North Korea that will unite peacefully with South Korea. The objectives to claim the bounty are an externally peaceful transition to a unified Korean peninsula.
Offer the same type bounty to Iran and Syria for internal transition of ruling power that complies with UN and International rules.
War is expensive, make the bounty worth the gamble.