Between a rock and a hard place... those 5 cities south of Genghis' capital are all captured city states. And Alex' second city is an incan city, that he captured after I paid him luxuries to go to war to distract his giant hoplite army marching towards me.
When this army appeared outside my borders I gave up even more luxuries, to have them go further towards Alex. At this point I was worrying, what might happen if Genghis actually wins and conquers Greece, leaving me squished between his cities. Or if they suddenly settle for peace with the host still messing around my cities.
Fortunately, Persia, the Incas and Polynesia allied later against the Mongols, forcing him to split up his troops. While Alex successfully dealt with the main force, some units wandered off to the north, never to be heard of again. However, the liberating commences.
I was actually pretty baffled when a report on pointiest sticks turned up, promoting two unknown civs to be the strongest in numbers. World Congress revealed, that the other continent was apparently a similar mess of early wars with the Huns and Assyria eating up the Ottomans (and Hiawatha idling along).