Questions about "rare situations"

[joshuadrache]

Hello, I play the gmae for 3 years now and sometimes the town is under "Siege Attack", or a single "scout" attacks the town.

But sometimes a whole army attacks a random house, including a warp gate.

but the situations are very rare. Is there a way to influence this situations, because i really love it to defend the town.

Or is all just random?