It's a pretty simple set up.
Two teams, with teammates on opposite corners.
The idea is that two converging generals have caught
an opposing general on the wrong side of a border wall.
That errant general does have allied support on the wall.
The teams have to decide the best way to deal with the other.
In this engagement, two of the armies clashed away
from the wall while two fought on it.
While attempting to breech the wall . . .
That lost catapult might have made the difference.
But the wall was being overrun.
And in the scrum on the other side . . .
The opposing catapult was lost as well.
It was a close match decided by a few points!