Playing a Regent game, huge, continents map.
My civ (Japanese) was in a continent close (2 tiles) to another continent. It was the "Very Early" Medieval Era. I had conquered almost all my continent, and the other one had only one civ, the Spanish, which were stronger than me, demanding things and getting in my territory. I couldn't get in a war with them, 'cause they were stronger, so I waited until I got Samurai.
I made 40 Samurais and put them all to attack one Spanish city, one which had Iron, conquered the city, triggered my Golden Age, and put all my production to Samurais and Galleys.
The result: I got 14 cities from them, left them with only 4 cities (which I conquered later, when I got bored).
It was GREAT!!!