This indeed was shown off during Blackwater, as the residents of King’s Landing were forced between the walls and the ocean.
Neil explained he brought in military strategy for the first time in the show’s history.
He revealed: “That was the first time we had really pushed – we had brought this military strategy to the entire thing, [for example]: How are they going to get in?”
Neil went on to detail some examples in how he differentiated the battle from other instances in the show.