Here's the map of the Finnish mapper from scribbler:
https://www.scribblemaps.com/maps/view/The%20War%20in%20Ukraine/091194
I overlayed to the Deepstate map here >>54796 made sure it fits, and traced the red and blue lines.
His use of these lines: red - Approximate Russian frontline, blue - area in Ukrainian control.
So in between is the "gray zone", no mans land.
While I was fiddling this I listened recent WillyOAM video, a chat with AMK Mapping.
https://yewtu.be/watch?v=HZy6WdWIEKg
https://youtube.com/watch?v=HZy6WdWIEKg [Embed]
Matt said something that with the Finnish map made me think how this "gray zone" works.
I think the red areas where Russians launch their attacks.
The blue where the AFU has manned positions. Up to the blue is the grey zone which the Russians keep under fire control, where they surpass Ukrainian firepower with their own and where their foot, the "DRG units" can operate and try to infiltrate through.
It's kinda like the creeping barrage of WWI.