Under Ottoman Empire treaty with Catherine the Great if Crimea declares independence it returns to Turkey — Headline from the Voices of Ukraine website
Attention all dictators with imperial ambitions
Conquests often come attached with footnotes and conditions
There isn’t any nation so disorganized and poor
It doesn’t have a lawyer on its diplomatic corps
The country you annexed or stole or conquered in a war
May be subject to a treaty from two centuries before
The Caucasus are full of little quirky traps and snags
So better do a Google search before you plant those flags.
Going back in history the records may get murky
And so a word of caution for the bureaucrats in Turkey
If you claim Crimea and decide that you should press on
Prepare to get a letter from the heirs of Kublai Khan