Serendipity is when something turns out to be unexpectedly lucky (from a novel 'The three princes of Serendip by Horace Walpole).

Has anything really fortuitous happened in your games?

The reason is that I am playing Pontus and had a fleet (ship really) with my army en route to take Byzantium (Macedon got their first actually). I was attacked twice going down from 40 to 11 men - and my two random escapes landed me next-door to Rhodes! (This is early on in the game)