“Speed is the essence of war. Take advantage of the enemy’s unpreparedness; travel by unexpected routes and strike him where he has taken no precautions.”

Speed is an advantage in itself. A small, fast force can defeat a large, slow one by moving before it can react, along paths it did not anticipate. For a startup or a small player, velocity and surprise are the great equalizers.
Chapter 11, on the nine situations, is written for armies deep in hostile ground — and its recurring remedy for weakness is velocity. Speed is the essence of war, Sun Tzu says: arrive unprepared-for by traveling unexpected routes. The chapter’s logic is that preparation is directional — the larger force fortifies where it expects you — so sheer pace on an unexpected bearing defeats mass.
A bank takes nine months to approve a product change; a credit union fintech ships a rougher version in five weeks, learns from three thousand real users, and ships again before the bank’s committee has reconvened. The bank has better capital, brand, and compliance. None of it is aimed yet. By the time it is, the small player is on its seventh version — and has taken the niche the committee was still debating.
Speed of what, exactly? Not of everything — hasty hiring, hasty contracts, and hasty code are Chapter 2’s prolonged war in miniature. The verse specifies the fast thing: movement along unexpected routes to strike unprepared points. Velocity is a weapon when aimed; everywhere else it is just churn.