Cutting off the supply lines seems like a good strategy.
Indirect approach – Dislocation is the aim of strategy. Direct attacks almost never work, one must first upset the enemy’s equilibrium, fix weakness and attack strength, Eight rules of strategy: 1) adjust your ends to your means, 2) keep your object always in mind, 3) choose the line of the least expectation, 4) exploit the line of least resistance, 5) take the line of operations which offers the most alternatives, 6) ensure both plans and dispositions are flexible, 7) do not throw your weight into an opponent while he is on guard, 8) do not renew an attack along the same lines if an attack has failed
SPJNK is a better idea.