The following are the principles to be observed by an invading force The further you penetrate int

“The following are the principles to be observed by an invading force: The further you penetrate into a country, the greater will be the solidarity of your troops, and thus the defenders will not prevail against you.”

“The Art of War by Active 6th Century B.C. Sunzi.” Gutenberg.Org, https://www.gutenberg.org/ebooks/132. Accessed 16 July 2021, loc. 123.

Though not a principle of combat, per se, a common experience among mankind, “success begets success.” Momentum grows the further a thing rolls downhill.