Thanks!
The role of Dorne in the Great Game was twofold:
- to act as a check on the Reach and the Stormlands – neither could “win” by permanently absorbing one of their neighbors because every time they focused their efforts in that direction, Dorne would hit them with raids that would either force them to pull back to keep what they had or weaken them to the point where they would be become too weak to hold on to what they’d grabbed.
- to act as a scavenger in times of weakness – hence invading the Reach during the reign of Garth X or attacking the Stormlands repeatedly when the Stormlands are on their way down – although this isn’t unique to Dorne.