Victory condition - conquer 6 capitals and hold them for 3 turns.
Certainly very premature but who typically measures the victory conditions? Does one declare "I have now held the Caps of a,b,c,d,e,f for six turns."? Maybe it is easier than I'm thinking but if the Caps are in "flux" it could get complicated. I'm guessing they need to be held simultaneously for (the same) three turns (losing one of the six for even one turn resets the clock).
Sorry... that's how I get working with attorneys.
-ssj