Ukraine is rapidly reshaping its Donbas frontline into a layered “kill zone” as Russian forces press forward. Kyiv is building deep fortress belts of trenches, mines, anti-tank obstacles and drone-covered fire sacks designed to slow advances and limit casualties. Blending modern trench warfare with drone dominance, Ukraine hopes this new defensive system can halt breakthroughs, protect supply routes, and buy critical time despite Russia’s growing momentum.