RAND advised Rumsfeld in 2005 to adopt non-linear flexible kill boxes.

Evidence

In a memo addressed in 2005 to secretary of defense Donald Rumsfeld, the president of the RAND Corporation advised him that “a non-linear system of ‘kill boxes’ should be adopted, as technology permits,” for counterinsurgency operations. He stressed the following essential point: “Kill boxes can be sized for open terrain or urban warfare and opened or closed quickly in response to a dynamic military situation.” — Grégoire Chamayou, A Theory of the Drone, 242

Related

• Kill boxes can be extended anywhere, anytime a qualifying target is found. (similarity 0.81)
• Kill boxes partition theaters of operations into three-dimensional cubes. (similarity 0.80)
• Drone missiles have larger lethal radii than conventional infantry weapons (similarity 0.79)
• Kill boxes authorize firing at will within designated airspace cubes. (similarity 0.78)