As a matter of fact that Spanish-controlled island does have one each of Oil and Rubber, of which I only have one each, so now that I've just made peace with the Greeks (bombarded their homeland and sunk a lot of their wooden ships with my destroyers and cruisers) I am readying an amphibious invasion team, and wondering whether to go after those polar Spanish first or not.Another blissful five-hour stretch of playing has seen my Dutch Knights, backed by Ancient Cavalry and Swiss Mercenaries, conquer some Spanish exclaves as well as the mainland. Not to be outdone, the Spanish sailed on to seize a lone Korean city in the middle of a permafrosted island near the south pole, so in the inevitable next war against the Spanish I can get away with not exterminating them because they'll have three permafrosted, coalless islands in the back of nowhere.
As a matter of fact the war against the Greeks stems from the fact that some 3 or 4 thousand years ago the Maya rushed to establish the city of Bonampak down in the tundra and I never conquered it because I'd never gone to war against them. Needless to say I just bargained with the Portuguese for 20 turns of Coal, built a looong railway all the way down to one tile away from Bonampak, and attacked it with Cavalry. Then, for good measure, I crossed the fortified (on my side only) isthmus on the other end of our sea border and conquered Chichén Itzá and two more cities, taking 2× Silks and the Sun Tzu wonder along the way. Mmm-mmm.