Instead, the Romans built a gigantic ramp of rock and earth extending from the nearest adjacent mountain so they could simply march up to the level of the walls.
The Romans got over the wall via a large ramp.
The Romans used ladders to get over the wall.
When selecting instances there needs to be an empirical basis for the purpose of the case study.
They move around
They are near a mountain.
A girl is cuddling her doll.
Two people standing at a train station.
The dog is eating dog food in the kitchen.