Cutting the enemy's supply line is a classic 'pull the firewood from under the cauldron' strategy.
Tips
history
Echoes Dong Zhuo's Han-dynasty memorial 《上何进书》: '扬汤止沸,莫若去薪。' — ladling out boiling soup is less effective than removing the firewood. Listed as one of the Thirty-Six Stratagems (三十六计·第十九计).
usage
Strongly strategic flavor — solving a problem by removing its cause rather than managing its symptoms. Contrast with 扬汤止沸 (ladle the soup to stop it boiling) = quick fix that doesn't last.