Do you think Nymeria’s Conquest of Dorne was at least partially motivated by something like “Never Again” ? After they survived the Valyrian onslaught & the pillaging of Basilisk Isle Corsairs, she was determined not to let independent rival power bases exist close by? On a similar thread, had the Rhoynar landed in a more unified andor stronger Kingdom like Westerlands, North or Reach, would Nymeria still have pushed for conquest or would she have bent her knee to the principal power?

1. Absolutely. We can see this from the text:

“To celebrate these unions, and make certain her people could not again retreat to the sea, Nymeria burned the Rhoynish ships. “Our wanderings are at an end,” she declared. “We have found a new home, and here we shall live and die.”

2. That’s a tricky question. Certainly, I think Nymeria was willing to assimilate – hence the mass marriages, etc. – but she very much wanted to assimilate into the very top of the social order, so that as much as possible she could incorporate Rhoynish culture into the land from the top down.