Tell that to North Vietnam.
Hence a wise general makes a point of foraging on the enemy. One cartload of the enemy's provisions is equivalent to twenty of one's own, and likewise a single picul of his provender is equivalent to twenty from one's own store.
And all you southerners complain about General Sherman and his campaign in Georgia...
Of course, Giap did what he had to do in circumstances in which he was confronted with a technically overpowering enemy.
"And all you southerners complain about General Sherman and his campaign in Georgia..."
Of course, Sherman did more than sieze enemy stores. The only things he left standing between Atlanta and the sea were the chimneys on the burned houses.