From https://www.polygon.com/gamescom/443918/civilization-7-hands-on-preview
This fits very well to what we have seen in the videos so far, as you actually had the impression there was a battle field.
Shirk said the team at Firaxis internally refers to the Civilization 4/5/6 style of combat as ‘Fish Slap’, in that one unit usually runs up and slaps the other with a proverbial fish, only to run away after and end the engagement. This led to the development of Civilization 7’s ‘continuous combat’ under combat designer Brian Feldges. When units engage, they smash together and scrap on the face of the hexagon they’re situated in, and the fighting doesn’t stop until you’ve issued all of your commands. “We wanted to establish facing so that flanking would look and feel right, and when the battles are joined, you actually have battle lines fighting in your game as you’re going through and doing all of your combat,” Shirk said. “And then you end turn, and only then do they return to their paths.”
This fits very well to what we have seen in the videos so far, as you actually had the impression there was a battle field.