How about South Korea’s off-and-on Sunshine Policy toward the North… Giving unconditional aid and abstaining from UN votes condemning the North’s human rights abuses in exchange for a de-escalation in tensions sure sounds like appeasement (and the South hardly even got that much; the North conducted a nuke test while the policy was in place). A different administration came in and in 2010 the policy was officially declared a failure, but the current president has been trying again.
In the past, the US and South Korea have given the north coal, oil, food aid, and other inducements to give up their reactor/end nuclear research, stop enrichment, stop production of plutonium. Not worked out so great. Both democratic and republican presidents have been in on this [del] non [/del] quid pro quo. The current administration however has been most vocal [thumb like] in praise of itself.