It kind of reminds you of Patton storming through France and the Germans kept falling back to establish a line.
Or like Robin Williams about Kadafi in the 80s.
“This is a ‘Line of Death’, you cross it, you die!”
“Ok. you cross this line you die.”
“Cross this line, you die.”
“Alright that’s it, you come knocking on my door, I’m not coming out....nyaah!”